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de1c301e LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2013 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 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 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <endian.h> | |
23 | #include <assert.h> | |
24 | #include <stdlib.h> | |
25 | #include <unistd.h> | |
26 | #include <netdb.h> | |
27 | #include <sys/poll.h> | |
28 | #include <byteswap.h> | |
63edf05e | 29 | #include <sys/mman.h> |
45fbe937 | 30 | #include <pthread.h> |
de1c301e LP |
31 | |
32 | #include "util.h" | |
33 | #include "macro.h" | |
2fd9ae2e | 34 | #include "strv.h" |
0a72c2bd | 35 | #include "set.h" |
6c03089c | 36 | #include "missing.h" |
de1c301e LP |
37 | |
38 | #include "sd-bus.h" | |
39 | #include "bus-internal.h" | |
40 | #include "bus-message.h" | |
41 | #include "bus-type.h" | |
a7e3212d | 42 | #include "bus-socket.h" |
6629161f | 43 | #include "bus-kernel.h" |
392d5b37 | 44 | #include "bus-control.h" |
29ddb38f LP |
45 | #include "bus-introspect.h" |
46 | #include "bus-signature.h" | |
992c052c | 47 | #include "bus-objects.h" |
40ca29a1 | 48 | #include "bus-util.h" |
a7893c6b | 49 | #include "bus-container.h" |
de1c301e | 50 | |
e3017af9 LP |
51 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec); |
52 | ||
f54514f3 LP |
53 | static void bus_close_fds(sd_bus *b) { |
54 | assert(b); | |
55 | ||
56 | if (b->input_fd >= 0) | |
57 | close_nointr_nofail(b->input_fd); | |
58 | ||
59 | if (b->output_fd >= 0 && b->output_fd != b->input_fd) | |
60 | close_nointr_nofail(b->output_fd); | |
61 | ||
62 | b->input_fd = b->output_fd = -1; | |
63 | } | |
64 | ||
29ddb38f LP |
65 | static void bus_node_destroy(sd_bus *b, struct node *n) { |
66 | struct node_callback *c; | |
67 | struct node_vtable *v; | |
68 | struct node_enumerator *e; | |
69 | ||
70 | assert(b); | |
71 | ||
72 | if (!n) | |
73 | return; | |
74 | ||
75 | while (n->child) | |
76 | bus_node_destroy(b, n->child); | |
77 | ||
78 | while ((c = n->callbacks)) { | |
71fda00f | 79 | LIST_REMOVE(callbacks, n->callbacks, c); |
29ddb38f LP |
80 | free(c); |
81 | } | |
82 | ||
83 | while ((v = n->vtables)) { | |
71fda00f | 84 | LIST_REMOVE(vtables, n->vtables, v); |
29ddb38f LP |
85 | free(v->interface); |
86 | free(v); | |
87 | } | |
88 | ||
89 | while ((e = n->enumerators)) { | |
71fda00f | 90 | LIST_REMOVE(enumerators, n->enumerators, e); |
29ddb38f LP |
91 | free(e); |
92 | } | |
93 | ||
94 | if (n->parent) | |
71fda00f | 95 | LIST_REMOVE(siblings, n->parent->child, n); |
29ddb38f LP |
96 | |
97 | assert_se(hashmap_remove(b->nodes, n->path) == n); | |
98 | free(n->path); | |
99 | free(n); | |
100 | } | |
101 | ||
de1c301e LP |
102 | static void bus_free(sd_bus *b) { |
103 | struct filter_callback *f; | |
29ddb38f | 104 | struct node *n; |
89ffcd2a | 105 | unsigned i; |
de1c301e LP |
106 | |
107 | assert(b); | |
108 | ||
40ca29a1 LP |
109 | sd_bus_detach_event(b); |
110 | ||
f54514f3 | 111 | bus_close_fds(b); |
de1c301e | 112 | |
63edf05e LP |
113 | if (b->kdbus_buffer) |
114 | munmap(b->kdbus_buffer, KDBUS_POOL_SIZE); | |
115 | ||
de1c301e | 116 | free(b->rbuffer); |
89ffcd2a | 117 | free(b->unique_name); |
2181a7f5 | 118 | free(b->auth_buffer); |
89ffcd2a | 119 | free(b->address); |
e9a967f9 | 120 | free(b->kernel); |
a7893c6b | 121 | free(b->machine); |
89ffcd2a | 122 | |
2fd9ae2e LP |
123 | free(b->exec_path); |
124 | strv_free(b->exec_argv); | |
125 | ||
2c93b4ef LP |
126 | close_many(b->fds, b->n_fds); |
127 | free(b->fds); | |
128 | ||
89ffcd2a LP |
129 | for (i = 0; i < b->rqueue_size; i++) |
130 | sd_bus_message_unref(b->rqueue[i]); | |
de1c301e | 131 | free(b->rqueue); |
89ffcd2a LP |
132 | |
133 | for (i = 0; i < b->wqueue_size; i++) | |
134 | sd_bus_message_unref(b->wqueue[i]); | |
de1c301e | 135 | free(b->wqueue); |
de1c301e LP |
136 | |
137 | hashmap_free_free(b->reply_callbacks); | |
e3017af9 | 138 | prioq_free(b->reply_callbacks_prioq); |
de1c301e LP |
139 | |
140 | while ((f = b->filter_callbacks)) { | |
71fda00f | 141 | LIST_REMOVE(callbacks, b->filter_callbacks, f); |
de1c301e LP |
142 | free(f); |
143 | } | |
144 | ||
392d5b37 LP |
145 | bus_match_free(&b->match_callbacks); |
146 | ||
29ddb38f LP |
147 | hashmap_free_free(b->vtable_methods); |
148 | hashmap_free_free(b->vtable_properties); | |
149 | ||
150 | while ((n = hashmap_first(b->nodes))) | |
151 | bus_node_destroy(b, n); | |
152 | ||
153 | hashmap_free(b->nodes); | |
154 | ||
bc7fd8cd LP |
155 | bus_kernel_flush_memfd(b); |
156 | ||
45fbe937 LP |
157 | assert_se(pthread_mutex_destroy(&b->memfd_cache_mutex) == 0); |
158 | ||
de1c301e LP |
159 | free(b); |
160 | } | |
161 | ||
d9f644e2 | 162 | _public_ int sd_bus_new(sd_bus **ret) { |
de1c301e LP |
163 | sd_bus *r; |
164 | ||
d6888822 | 165 | assert_return(ret, -EINVAL); |
021a1e78 | 166 | |
de1c301e LP |
167 | r = new0(sd_bus, 1); |
168 | if (!r) | |
021a1e78 | 169 | return -ENOMEM; |
de1c301e | 170 | |
e4ee6e5c | 171 | r->n_ref = REFCNT_INIT; |
e82c9509 | 172 | r->input_fd = r->output_fd = -1; |
de1c301e | 173 | r->message_version = 1; |
264ad849 | 174 | r->hello_flags |= KDBUS_HELLO_ACCEPT_FD; |
d5a2b9a6 | 175 | r->original_pid = getpid(); |
de1c301e | 176 | |
45fbe937 LP |
177 | assert_se(pthread_mutex_init(&r->memfd_cache_mutex, NULL) == 0); |
178 | ||
de1c301e LP |
179 | /* We guarantee that wqueue always has space for at least one |
180 | * entry */ | |
181 | r->wqueue = new(sd_bus_message*, 1); | |
182 | if (!r->wqueue) { | |
183 | free(r); | |
021a1e78 | 184 | return -ENOMEM; |
de1c301e LP |
185 | } |
186 | ||
021a1e78 LP |
187 | *ret = r; |
188 | return 0; | |
189 | } | |
190 | ||
d9f644e2 | 191 | _public_ int sd_bus_set_address(sd_bus *bus, const char *address) { |
021a1e78 LP |
192 | char *a; |
193 | ||
d6888822 LP |
194 | assert_return(bus, -EINVAL); |
195 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
196 | assert_return(address, -EINVAL); | |
197 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
198 | |
199 | a = strdup(address); | |
200 | if (!a) | |
201 | return -ENOMEM; | |
202 | ||
203 | free(bus->address); | |
204 | bus->address = a; | |
205 | ||
206 | return 0; | |
207 | } | |
208 | ||
d9f644e2 | 209 | _public_ int sd_bus_set_fd(sd_bus *bus, int input_fd, int output_fd) { |
d6888822 LP |
210 | assert_return(bus, -EINVAL); |
211 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
212 | assert_return(input_fd >= 0, -EINVAL); | |
213 | assert_return(output_fd >= 0, -EINVAL); | |
214 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 215 | |
e82c9509 LP |
216 | bus->input_fd = input_fd; |
217 | bus->output_fd = output_fd; | |
021a1e78 LP |
218 | return 0; |
219 | } | |
220 | ||
d9f644e2 | 221 | _public_ int sd_bus_set_exec(sd_bus *bus, const char *path, char *const argv[]) { |
2fd9ae2e LP |
222 | char *p, **a; |
223 | ||
d6888822 LP |
224 | assert_return(bus, -EINVAL); |
225 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
226 | assert_return(path, -EINVAL); | |
227 | assert_return(!strv_isempty(argv), -EINVAL); | |
228 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2fd9ae2e LP |
229 | |
230 | p = strdup(path); | |
231 | if (!p) | |
232 | return -ENOMEM; | |
233 | ||
234 | a = strv_copy(argv); | |
235 | if (!a) { | |
236 | free(p); | |
237 | return -ENOMEM; | |
238 | } | |
239 | ||
240 | free(bus->exec_path); | |
241 | strv_free(bus->exec_argv); | |
242 | ||
243 | bus->exec_path = p; | |
244 | bus->exec_argv = a; | |
245 | ||
246 | return 0; | |
247 | } | |
248 | ||
d9f644e2 | 249 | _public_ int sd_bus_set_bus_client(sd_bus *bus, int b) { |
d6888822 LP |
250 | assert_return(bus, -EINVAL); |
251 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
252 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 253 | |
94bbf1ba | 254 | bus->bus_client = !!b; |
021a1e78 LP |
255 | return 0; |
256 | } | |
257 | ||
d9f644e2 | 258 | _public_ int sd_bus_negotiate_fds(sd_bus *bus, int b) { |
d6888822 LP |
259 | assert_return(bus, -EINVAL); |
260 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
261 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 262 | |
264ad849 LP |
263 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ACCEPT_FD, b); |
264 | return 0; | |
265 | } | |
266 | ||
f21326e6 | 267 | _public_ int sd_bus_negotiate_attach_timestamp(sd_bus *bus, int b) { |
16be4368 KS |
268 | assert_return(bus, -EINVAL); |
269 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
270 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
271 | ||
f21326e6 | 272 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_TIMESTAMP, b); |
16be4368 KS |
273 | return 0; |
274 | } | |
275 | ||
f21326e6 | 276 | _public_ int sd_bus_negotiate_attach_creds(sd_bus *bus, int b) { |
16be4368 KS |
277 | assert_return(bus, -EINVAL); |
278 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
279 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
280 | ||
f21326e6 | 281 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_CREDS, b); |
16be4368 KS |
282 | return 0; |
283 | } | |
284 | ||
d9f644e2 | 285 | _public_ int sd_bus_negotiate_attach_comm(sd_bus *bus, int b) { |
d6888822 LP |
286 | assert_return(bus, -EINVAL); |
287 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
288 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
264ad849 LP |
289 | |
290 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_COMM, b); | |
291 | return 0; | |
292 | } | |
293 | ||
d9f644e2 | 294 | _public_ int sd_bus_negotiate_attach_exe(sd_bus *bus, int b) { |
d6888822 LP |
295 | assert_return(bus, -EINVAL); |
296 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
297 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
264ad849 LP |
298 | |
299 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_EXE, b); | |
300 | return 0; | |
301 | } | |
302 | ||
d9f644e2 | 303 | _public_ int sd_bus_negotiate_attach_cmdline(sd_bus *bus, int b) { |
d6888822 LP |
304 | assert_return(bus, -EINVAL); |
305 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
306 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
264ad849 LP |
307 | |
308 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_CMDLINE, b); | |
309 | return 0; | |
310 | } | |
311 | ||
d9f644e2 | 312 | _public_ int sd_bus_negotiate_attach_cgroup(sd_bus *bus, int b) { |
d6888822 LP |
313 | assert_return(bus, -EINVAL); |
314 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
315 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
264ad849 LP |
316 | |
317 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_CGROUP, b); | |
318 | return 0; | |
319 | } | |
320 | ||
d9f644e2 | 321 | _public_ int sd_bus_negotiate_attach_caps(sd_bus *bus, int b) { |
d6888822 LP |
322 | assert_return(bus, -EINVAL); |
323 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
324 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
264ad849 LP |
325 | |
326 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_CAPS, b); | |
327 | return 0; | |
328 | } | |
329 | ||
d9f644e2 | 330 | _public_ int sd_bus_negotiate_attach_selinux_context(sd_bus *bus, int b) { |
d6888822 LP |
331 | assert_return(bus, -EINVAL); |
332 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
333 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
264ad849 LP |
334 | |
335 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_SECLABEL, b); | |
336 | return 0; | |
337 | } | |
338 | ||
d9f644e2 | 339 | _public_ int sd_bus_negotiate_attach_audit(sd_bus *bus, int b) { |
d6888822 LP |
340 | assert_return(bus, -EINVAL); |
341 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
342 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
264ad849 LP |
343 | |
344 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_AUDIT, b); | |
021a1e78 LP |
345 | return 0; |
346 | } | |
de1c301e | 347 | |
d9f644e2 | 348 | _public_ int sd_bus_set_server(sd_bus *bus, int b, sd_id128_t server_id) { |
d6888822 LP |
349 | assert_return(bus, -EINVAL); |
350 | assert_return(b || sd_id128_equal(server_id, SD_ID128_NULL), -EINVAL); | |
351 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
352 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2181a7f5 LP |
353 | |
354 | bus->is_server = !!b; | |
98178d39 | 355 | bus->server_id = server_id; |
2181a7f5 LP |
356 | return 0; |
357 | } | |
358 | ||
d9f644e2 | 359 | _public_ int sd_bus_set_anonymous(sd_bus *bus, int b) { |
d6888822 LP |
360 | assert_return(bus, -EINVAL); |
361 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
362 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2181a7f5 LP |
363 | |
364 | bus->anonymous_auth = !!b; | |
365 | return 0; | |
366 | } | |
367 | ||
eb01ba5d | 368 | static int hello_callback(sd_bus *bus, sd_bus_message *reply, void *userdata) { |
de1c301e LP |
369 | const char *s; |
370 | int r; | |
371 | ||
372 | assert(bus); | |
021a1e78 | 373 | assert(bus->state == BUS_HELLO); |
de1c301e LP |
374 | assert(reply); |
375 | ||
40ca29a1 | 376 | r = sd_bus_message_get_errno(reply); |
eb01ba5d LP |
377 | if (r < 0) |
378 | return r; | |
40ca29a1 LP |
379 | if (r > 0) |
380 | return -r; | |
eb01ba5d | 381 | |
de1c301e LP |
382 | r = sd_bus_message_read(reply, "s", &s); |
383 | if (r < 0) | |
384 | return r; | |
385 | ||
dafb7591 LP |
386 | if (!service_name_is_valid(s) || s[0] != ':') |
387 | return -EBADMSG; | |
388 | ||
de1c301e LP |
389 | bus->unique_name = strdup(s); |
390 | if (!bus->unique_name) | |
391 | return -ENOMEM; | |
392 | ||
dafb7591 LP |
393 | bus->state = BUS_RUNNING; |
394 | ||
de1c301e LP |
395 | return 1; |
396 | } | |
397 | ||
398 | static int bus_send_hello(sd_bus *bus) { | |
399 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
400 | int r; | |
401 | ||
402 | assert(bus); | |
403 | ||
6629161f | 404 | if (!bus->bus_client || bus->is_kernel) |
021a1e78 LP |
405 | return 0; |
406 | ||
de1c301e LP |
407 | r = sd_bus_message_new_method_call( |
408 | bus, | |
409 | "org.freedesktop.DBus", | |
410 | "/", | |
411 | "org.freedesktop.DBus", | |
412 | "Hello", | |
413 | &m); | |
414 | if (r < 0) | |
415 | return r; | |
416 | ||
c49b30a2 | 417 | return sd_bus_call_async(bus, m, hello_callback, NULL, 0, &bus->hello_serial); |
de1c301e LP |
418 | } |
419 | ||
a7e3212d | 420 | int bus_start_running(sd_bus *bus) { |
de1c301e LP |
421 | assert(bus); |
422 | ||
f08838da | 423 | if (bus->bus_client && !bus->is_kernel) { |
de1c301e | 424 | bus->state = BUS_HELLO; |
e3017af9 | 425 | return 1; |
de1c301e LP |
426 | } |
427 | ||
428 | bus->state = BUS_RUNNING; | |
e3017af9 | 429 | return 1; |
de1c301e LP |
430 | } |
431 | ||
432 | static int parse_address_key(const char **p, const char *key, char **value) { | |
433 | size_t l, n = 0; | |
434 | const char *a; | |
435 | char *r = NULL; | |
436 | ||
437 | assert(p); | |
438 | assert(*p); | |
de1c301e LP |
439 | assert(value); |
440 | ||
2fd9ae2e LP |
441 | if (key) { |
442 | l = strlen(key); | |
443 | if (strncmp(*p, key, l) != 0) | |
444 | return 0; | |
de1c301e | 445 | |
2fd9ae2e LP |
446 | if ((*p)[l] != '=') |
447 | return 0; | |
de1c301e | 448 | |
2fd9ae2e LP |
449 | if (*value) |
450 | return -EINVAL; | |
de1c301e | 451 | |
2fd9ae2e LP |
452 | a = *p + l + 1; |
453 | } else | |
454 | a = *p; | |
455 | ||
456 | while (*a != ';' && *a != ',' && *a != 0) { | |
de1c301e LP |
457 | char c, *t; |
458 | ||
459 | if (*a == '%') { | |
460 | int x, y; | |
461 | ||
462 | x = unhexchar(a[1]); | |
463 | if (x < 0) { | |
464 | free(r); | |
465 | return x; | |
466 | } | |
467 | ||
468 | y = unhexchar(a[2]); | |
469 | if (y < 0) { | |
470 | free(r); | |
471 | return y; | |
472 | } | |
473 | ||
de1c301e | 474 | c = (char) ((x << 4) | y); |
89ffcd2a LP |
475 | a += 3; |
476 | } else { | |
de1c301e | 477 | c = *a; |
89ffcd2a LP |
478 | a++; |
479 | } | |
de1c301e | 480 | |
89ffcd2a | 481 | t = realloc(r, n + 2); |
de1c301e LP |
482 | if (!t) { |
483 | free(r); | |
484 | return -ENOMEM; | |
485 | } | |
486 | ||
487 | r = t; | |
488 | r[n++] = c; | |
489 | } | |
490 | ||
89ffcd2a LP |
491 | if (!r) { |
492 | r = strdup(""); | |
493 | if (!r) | |
494 | return -ENOMEM; | |
495 | } else | |
496 | r[n] = 0; | |
497 | ||
498 | if (*a == ',') | |
499 | a++; | |
500 | ||
de1c301e | 501 | *p = a; |
2fd9ae2e LP |
502 | |
503 | free(*value); | |
de1c301e | 504 | *value = r; |
2fd9ae2e | 505 | |
de1c301e LP |
506 | return 1; |
507 | } | |
508 | ||
509 | static void skip_address_key(const char **p) { | |
510 | assert(p); | |
511 | assert(*p); | |
512 | ||
89ffcd2a LP |
513 | *p += strcspn(*p, ","); |
514 | ||
515 | if (**p == ',') | |
516 | (*p) ++; | |
de1c301e LP |
517 | } |
518 | ||
2fd9ae2e LP |
519 | static int parse_unix_address(sd_bus *b, const char **p, char **guid) { |
520 | _cleanup_free_ char *path = NULL, *abstract = NULL; | |
521 | size_t l; | |
de1c301e LP |
522 | int r; |
523 | ||
524 | assert(b); | |
2fd9ae2e LP |
525 | assert(p); |
526 | assert(*p); | |
527 | assert(guid); | |
de1c301e | 528 | |
2fd9ae2e LP |
529 | while (**p != 0 && **p != ';') { |
530 | r = parse_address_key(p, "guid", guid); | |
531 | if (r < 0) | |
532 | return r; | |
533 | else if (r > 0) | |
534 | continue; | |
de1c301e | 535 | |
2fd9ae2e LP |
536 | r = parse_address_key(p, "path", &path); |
537 | if (r < 0) | |
538 | return r; | |
539 | else if (r > 0) | |
540 | continue; | |
de1c301e | 541 | |
2fd9ae2e LP |
542 | r = parse_address_key(p, "abstract", &abstract); |
543 | if (r < 0) | |
544 | return r; | |
545 | else if (r > 0) | |
546 | continue; | |
de1c301e | 547 | |
2fd9ae2e LP |
548 | skip_address_key(p); |
549 | } | |
de1c301e | 550 | |
2fd9ae2e LP |
551 | if (!path && !abstract) |
552 | return -EINVAL; | |
de1c301e | 553 | |
2fd9ae2e LP |
554 | if (path && abstract) |
555 | return -EINVAL; | |
556 | ||
557 | if (path) { | |
558 | l = strlen(path); | |
559 | if (l > sizeof(b->sockaddr.un.sun_path)) | |
560 | return -E2BIG; | |
de1c301e | 561 | |
2fd9ae2e LP |
562 | b->sockaddr.un.sun_family = AF_UNIX; |
563 | strncpy(b->sockaddr.un.sun_path, path, sizeof(b->sockaddr.un.sun_path)); | |
564 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l; | |
565 | } else if (abstract) { | |
566 | l = strlen(abstract); | |
567 | if (l > sizeof(b->sockaddr.un.sun_path) - 1) | |
568 | return -E2BIG; | |
569 | ||
570 | b->sockaddr.un.sun_family = AF_UNIX; | |
571 | b->sockaddr.un.sun_path[0] = 0; | |
572 | strncpy(b->sockaddr.un.sun_path+1, abstract, sizeof(b->sockaddr.un.sun_path)-1); | |
573 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + 1 + l; | |
574 | } | |
575 | ||
576 | return 0; | |
577 | } | |
578 | ||
579 | static int parse_tcp_address(sd_bus *b, const char **p, char **guid) { | |
580 | _cleanup_free_ char *host = NULL, *port = NULL, *family = NULL; | |
2fd9ae2e | 581 | int r; |
b92bea5d ZJS |
582 | struct addrinfo *result, hints = { |
583 | .ai_socktype = SOCK_STREAM, | |
584 | .ai_flags = AI_ADDRCONFIG, | |
585 | }; | |
2fd9ae2e LP |
586 | |
587 | assert(b); | |
588 | assert(p); | |
589 | assert(*p); | |
590 | assert(guid); | |
591 | ||
592 | while (**p != 0 && **p != ';') { | |
593 | r = parse_address_key(p, "guid", guid); | |
594 | if (r < 0) | |
595 | return r; | |
596 | else if (r > 0) | |
597 | continue; | |
598 | ||
599 | r = parse_address_key(p, "host", &host); | |
600 | if (r < 0) | |
601 | return r; | |
602 | else if (r > 0) | |
603 | continue; | |
604 | ||
605 | r = parse_address_key(p, "port", &port); | |
606 | if (r < 0) | |
607 | return r; | |
608 | else if (r > 0) | |
609 | continue; | |
610 | ||
611 | r = parse_address_key(p, "family", &family); | |
612 | if (r < 0) | |
613 | return r; | |
614 | else if (r > 0) | |
615 | continue; | |
616 | ||
617 | skip_address_key(p); | |
618 | } | |
619 | ||
620 | if (!host || !port) | |
621 | return -EINVAL; | |
622 | ||
2fd9ae2e LP |
623 | if (family) { |
624 | if (streq(family, "ipv4")) | |
625 | hints.ai_family = AF_INET; | |
626 | else if (streq(family, "ipv6")) | |
627 | hints.ai_family = AF_INET6; | |
628 | else | |
629 | return -EINVAL; | |
630 | } | |
631 | ||
632 | r = getaddrinfo(host, port, &hints, &result); | |
633 | if (r == EAI_SYSTEM) | |
634 | return -errno; | |
635 | else if (r != 0) | |
636 | return -EADDRNOTAVAIL; | |
637 | ||
638 | memcpy(&b->sockaddr, result->ai_addr, result->ai_addrlen); | |
639 | b->sockaddr_size = result->ai_addrlen; | |
640 | ||
641 | freeaddrinfo(result); | |
642 | ||
643 | return 0; | |
644 | } | |
645 | ||
646 | static int parse_exec_address(sd_bus *b, const char **p, char **guid) { | |
647 | char *path = NULL; | |
648 | unsigned n_argv = 0, j; | |
649 | char **argv = NULL; | |
650 | int r; | |
651 | ||
652 | assert(b); | |
653 | assert(p); | |
654 | assert(*p); | |
655 | assert(guid); | |
656 | ||
657 | while (**p != 0 && **p != ';') { | |
658 | r = parse_address_key(p, "guid", guid); | |
659 | if (r < 0) | |
660 | goto fail; | |
661 | else if (r > 0) | |
662 | continue; | |
663 | ||
664 | r = parse_address_key(p, "path", &path); | |
665 | if (r < 0) | |
666 | goto fail; | |
667 | else if (r > 0) | |
668 | continue; | |
669 | ||
670 | if (startswith(*p, "argv")) { | |
671 | unsigned ul; | |
672 | ||
673 | errno = 0; | |
674 | ul = strtoul(*p + 4, (char**) p, 10); | |
8333c77e | 675 | if (errno > 0 || **p != '=' || ul > 256) { |
2fd9ae2e LP |
676 | r = -EINVAL; |
677 | goto fail; | |
678 | } | |
679 | ||
680 | (*p) ++; | |
681 | ||
682 | if (ul >= n_argv) { | |
683 | char **x; | |
684 | ||
685 | x = realloc(argv, sizeof(char*) * (ul + 2)); | |
686 | if (!x) { | |
687 | r = -ENOMEM; | |
688 | goto fail; | |
689 | } | |
690 | ||
691 | memset(x + n_argv, 0, sizeof(char*) * (ul - n_argv + 2)); | |
692 | ||
693 | argv = x; | |
694 | n_argv = ul + 1; | |
695 | } | |
696 | ||
697 | r = parse_address_key(p, NULL, argv + ul); | |
de1c301e | 698 | if (r < 0) |
2fd9ae2e | 699 | goto fail; |
de1c301e | 700 | |
2fd9ae2e | 701 | continue; |
de1c301e LP |
702 | } |
703 | ||
2fd9ae2e LP |
704 | skip_address_key(p); |
705 | } | |
de1c301e | 706 | |
5a0f6033 LP |
707 | if (!path) { |
708 | r = -EINVAL; | |
2fd9ae2e | 709 | goto fail; |
5a0f6033 | 710 | } |
de1c301e | 711 | |
2fd9ae2e LP |
712 | /* Make sure there are no holes in the array, with the |
713 | * exception of argv[0] */ | |
714 | for (j = 1; j < n_argv; j++) | |
715 | if (!argv[j]) { | |
716 | r = -EINVAL; | |
717 | goto fail; | |
718 | } | |
719 | ||
720 | if (argv && argv[0] == NULL) { | |
721 | argv[0] = strdup(path); | |
722 | if (!argv[0]) { | |
723 | r = -ENOMEM; | |
724 | goto fail; | |
725 | } | |
726 | } | |
de1c301e | 727 | |
2fd9ae2e LP |
728 | b->exec_path = path; |
729 | b->exec_argv = argv; | |
730 | return 0; | |
de1c301e | 731 | |
2fd9ae2e LP |
732 | fail: |
733 | for (j = 0; j < n_argv; j++) | |
734 | free(argv[j]); | |
735 | ||
736 | free(argv); | |
737 | free(path); | |
738 | return r; | |
739 | } | |
740 | ||
6629161f LP |
741 | static int parse_kernel_address(sd_bus *b, const char **p, char **guid) { |
742 | _cleanup_free_ char *path = NULL; | |
743 | int r; | |
744 | ||
745 | assert(b); | |
746 | assert(p); | |
747 | assert(*p); | |
748 | assert(guid); | |
749 | ||
750 | while (**p != 0 && **p != ';') { | |
751 | r = parse_address_key(p, "guid", guid); | |
752 | if (r < 0) | |
753 | return r; | |
754 | else if (r > 0) | |
755 | continue; | |
756 | ||
757 | r = parse_address_key(p, "path", &path); | |
758 | if (r < 0) | |
759 | return r; | |
760 | else if (r > 0) | |
761 | continue; | |
762 | ||
763 | skip_address_key(p); | |
764 | } | |
765 | ||
766 | if (!path) | |
767 | return -EINVAL; | |
768 | ||
769 | free(b->kernel); | |
770 | b->kernel = path; | |
771 | path = NULL; | |
772 | ||
773 | return 0; | |
774 | } | |
775 | ||
a7893c6b LP |
776 | static int parse_container_address(sd_bus *b, const char **p, char **guid) { |
777 | _cleanup_free_ char *machine = NULL; | |
778 | int r; | |
779 | ||
780 | assert(b); | |
781 | assert(p); | |
782 | assert(*p); | |
783 | assert(guid); | |
784 | ||
785 | while (**p != 0 && **p != ';') { | |
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, "machine", &machine); | |
793 | if (r < 0) | |
794 | return r; | |
795 | else if (r > 0) | |
796 | continue; | |
797 | ||
798 | skip_address_key(p); | |
799 | } | |
800 | ||
801 | if (!machine) | |
802 | return -EINVAL; | |
803 | ||
804 | free(b->machine); | |
805 | b->machine = machine; | |
806 | machine = NULL; | |
807 | ||
808 | b->sockaddr.un.sun_family = AF_UNIX; | |
809 | strncpy(b->sockaddr.un.sun_path, "/var/run/dbus/system_bus_socket", sizeof(b->sockaddr.un.sun_path)); | |
810 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + sizeof("/var/run/dbus/system_bus_socket") - 1; | |
811 | ||
812 | return 0; | |
813 | } | |
814 | ||
2fd9ae2e LP |
815 | static void bus_reset_parsed_address(sd_bus *b) { |
816 | assert(b); | |
817 | ||
818 | zero(b->sockaddr); | |
819 | b->sockaddr_size = 0; | |
820 | strv_free(b->exec_argv); | |
821 | free(b->exec_path); | |
822 | b->exec_path = NULL; | |
823 | b->exec_argv = NULL; | |
98178d39 | 824 | b->server_id = SD_ID128_NULL; |
6629161f LP |
825 | free(b->kernel); |
826 | b->kernel = NULL; | |
a7893c6b LP |
827 | free(b->machine); |
828 | b->machine = NULL; | |
2fd9ae2e LP |
829 | } |
830 | ||
831 | static int bus_parse_next_address(sd_bus *b) { | |
832 | _cleanup_free_ char *guid = NULL; | |
833 | const char *a; | |
834 | int r; | |
835 | ||
836 | assert(b); | |
837 | ||
838 | if (!b->address) | |
839 | return 0; | |
840 | if (b->address[b->address_index] == 0) | |
841 | return 0; | |
842 | ||
843 | bus_reset_parsed_address(b); | |
844 | ||
845 | a = b->address + b->address_index; | |
de1c301e | 846 | |
2fd9ae2e | 847 | while (*a != 0) { |
de1c301e | 848 | |
2fd9ae2e LP |
849 | if (*a == ';') { |
850 | a++; | |
851 | continue; | |
de1c301e LP |
852 | } |
853 | ||
2fd9ae2e LP |
854 | if (startswith(a, "unix:")) { |
855 | a += 5; | |
de1c301e | 856 | |
2fd9ae2e | 857 | r = parse_unix_address(b, &a, &guid); |
de1c301e LP |
858 | if (r < 0) |
859 | return r; | |
2fd9ae2e | 860 | break; |
de1c301e | 861 | |
2fd9ae2e | 862 | } else if (startswith(a, "tcp:")) { |
de1c301e | 863 | |
2fd9ae2e LP |
864 | a += 4; |
865 | r = parse_tcp_address(b, &a, &guid); | |
de1c301e LP |
866 | if (r < 0) |
867 | return r; | |
de1c301e | 868 | |
2fd9ae2e LP |
869 | break; |
870 | ||
871 | } else if (startswith(a, "unixexec:")) { | |
872 | ||
873 | a += 9; | |
874 | r = parse_exec_address(b, &a, &guid); | |
de1c301e LP |
875 | if (r < 0) |
876 | return r; | |
de1c301e | 877 | |
2fd9ae2e | 878 | break; |
de1c301e | 879 | |
6629161f LP |
880 | } else if (startswith(a, "kernel:")) { |
881 | ||
882 | a += 7; | |
883 | r = parse_kernel_address(b, &a, &guid); | |
884 | if (r < 0) | |
885 | return r; | |
886 | ||
a7893c6b LP |
887 | break; |
888 | } else if (startswith(a, "x-container:")) { | |
889 | ||
890 | a += 12; | |
891 | r = parse_container_address(b, &a, &guid); | |
892 | if (r < 0) | |
893 | return r; | |
894 | ||
6629161f | 895 | break; |
de1c301e LP |
896 | } |
897 | ||
2fd9ae2e LP |
898 | a = strchr(a, ';'); |
899 | if (!a) | |
900 | return 0; | |
de1c301e LP |
901 | } |
902 | ||
903 | if (guid) { | |
98178d39 | 904 | r = sd_id128_from_string(guid, &b->server_id); |
de1c301e LP |
905 | if (r < 0) |
906 | return r; | |
907 | } | |
908 | ||
2fd9ae2e | 909 | b->address_index = a - b->address; |
de1c301e LP |
910 | return 1; |
911 | } | |
912 | ||
a7e3212d | 913 | static int bus_start_address(sd_bus *b) { |
2fd9ae2e LP |
914 | int r; |
915 | ||
916 | assert(b); | |
917 | ||
918 | for (;;) { | |
e82c9509 | 919 | sd_bus_close(b); |
2fd9ae2e | 920 | |
a7893c6b | 921 | if (b->exec_path) { |
a7e3212d | 922 | |
a7893c6b | 923 | r = bus_socket_exec(b); |
2fd9ae2e LP |
924 | if (r >= 0) |
925 | return r; | |
926 | ||
927 | b->last_connect_error = -r; | |
a7893c6b | 928 | } else if (b->kernel) { |
2fd9ae2e | 929 | |
a7893c6b LP |
930 | r = bus_kernel_connect(b); |
931 | if (r >= 0) | |
932 | return r; | |
2fd9ae2e | 933 | |
a7893c6b LP |
934 | b->last_connect_error = -r; |
935 | ||
936 | } else if (b->machine) { | |
937 | ||
938 | r = bus_container_connect(b); | |
2fd9ae2e LP |
939 | if (r >= 0) |
940 | return r; | |
941 | ||
6629161f | 942 | b->last_connect_error = -r; |
6629161f | 943 | |
a7893c6b LP |
944 | } else if (b->sockaddr.sa.sa_family != AF_UNSPEC) { |
945 | ||
946 | r = bus_socket_connect(b); | |
6629161f LP |
947 | if (r >= 0) |
948 | return r; | |
949 | ||
2fd9ae2e LP |
950 | b->last_connect_error = -r; |
951 | } | |
952 | ||
953 | r = bus_parse_next_address(b); | |
954 | if (r < 0) | |
955 | return r; | |
956 | if (r == 0) | |
957 | return b->last_connect_error ? -b->last_connect_error : -ECONNREFUSED; | |
de1c301e LP |
958 | } |
959 | } | |
960 | ||
a7e3212d LP |
961 | int bus_next_address(sd_bus *b) { |
962 | assert(b); | |
963 | ||
964 | bus_reset_parsed_address(b); | |
965 | return bus_start_address(b); | |
966 | } | |
967 | ||
021a1e78 | 968 | static int bus_start_fd(sd_bus *b) { |
6629161f | 969 | struct stat st; |
021a1e78 LP |
970 | int r; |
971 | ||
972 | assert(b); | |
e82c9509 LP |
973 | assert(b->input_fd >= 0); |
974 | assert(b->output_fd >= 0); | |
021a1e78 | 975 | |
e82c9509 | 976 | r = fd_nonblock(b->input_fd, true); |
021a1e78 LP |
977 | if (r < 0) |
978 | return r; | |
979 | ||
e82c9509 | 980 | r = fd_cloexec(b->input_fd, true); |
021a1e78 LP |
981 | if (r < 0) |
982 | return r; | |
983 | ||
e82c9509 LP |
984 | if (b->input_fd != b->output_fd) { |
985 | r = fd_nonblock(b->output_fd, true); | |
986 | if (r < 0) | |
987 | return r; | |
988 | ||
989 | r = fd_cloexec(b->output_fd, true); | |
990 | if (r < 0) | |
991 | return r; | |
992 | } | |
993 | ||
6629161f LP |
994 | if (fstat(b->input_fd, &st) < 0) |
995 | return -errno; | |
996 | ||
997 | if (S_ISCHR(b->input_fd)) | |
998 | return bus_kernel_take_fd(b); | |
999 | else | |
1000 | return bus_socket_take_fd(b); | |
021a1e78 LP |
1001 | } |
1002 | ||
d9f644e2 | 1003 | _public_ int sd_bus_start(sd_bus *bus) { |
021a1e78 LP |
1004 | int r; |
1005 | ||
d6888822 LP |
1006 | assert_return(bus, -EINVAL); |
1007 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
1008 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
1009 | |
1010 | bus->state = BUS_OPENING; | |
1011 | ||
2181a7f5 LP |
1012 | if (bus->is_server && bus->bus_client) |
1013 | return -EINVAL; | |
1014 | ||
e82c9509 | 1015 | if (bus->input_fd >= 0) |
021a1e78 | 1016 | r = bus_start_fd(bus); |
a7893c6b | 1017 | else if (bus->address || bus->sockaddr.sa.sa_family != AF_UNSPEC || bus->exec_path || bus->kernel || bus->machine) |
a7e3212d | 1018 | r = bus_start_address(bus); |
021a1e78 LP |
1019 | else |
1020 | return -EINVAL; | |
1021 | ||
1022 | if (r < 0) | |
1023 | return r; | |
1024 | ||
1025 | return bus_send_hello(bus); | |
1026 | } | |
1027 | ||
d9f644e2 | 1028 | _public_ int sd_bus_open_system(sd_bus **ret) { |
de1c301e LP |
1029 | const char *e; |
1030 | sd_bus *b; | |
1031 | int r; | |
1032 | ||
d6888822 | 1033 | assert_return(ret, -EINVAL); |
de1c301e | 1034 | |
021a1e78 LP |
1035 | r = sd_bus_new(&b); |
1036 | if (r < 0) | |
1037 | return r; | |
1038 | ||
6c03089c | 1039 | e = secure_getenv("DBUS_SYSTEM_BUS_ADDRESS"); |
de1c301e | 1040 | if (e) { |
021a1e78 | 1041 | r = sd_bus_set_address(b, e); |
de1c301e | 1042 | if (r < 0) |
021a1e78 | 1043 | goto fail; |
89ffcd2a | 1044 | } else { |
89ffcd2a LP |
1045 | b->sockaddr.un.sun_family = AF_UNIX; |
1046 | strncpy(b->sockaddr.un.sun_path, "/run/dbus/system_bus_socket", sizeof(b->sockaddr.un.sun_path)); | |
1047 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + sizeof("/run/dbus/system_bus_socket") - 1; | |
89ffcd2a | 1048 | } |
de1c301e | 1049 | |
94bbf1ba | 1050 | b->bus_client = true; |
021a1e78 LP |
1051 | |
1052 | r = sd_bus_start(b); | |
1053 | if (r < 0) | |
1054 | goto fail; | |
de1c301e LP |
1055 | |
1056 | *ret = b; | |
1057 | return 0; | |
021a1e78 LP |
1058 | |
1059 | fail: | |
1060 | bus_free(b); | |
1061 | return r; | |
de1c301e LP |
1062 | } |
1063 | ||
d9f644e2 | 1064 | _public_ int sd_bus_open_user(sd_bus **ret) { |
de1c301e LP |
1065 | const char *e; |
1066 | sd_bus *b; | |
1067 | size_t l; | |
1068 | int r; | |
1069 | ||
d6888822 | 1070 | assert_return(ret, -EINVAL); |
de1c301e | 1071 | |
021a1e78 LP |
1072 | r = sd_bus_new(&b); |
1073 | if (r < 0) | |
1074 | return r; | |
1075 | ||
6c03089c | 1076 | e = secure_getenv("DBUS_SESSION_BUS_ADDRESS"); |
de1c301e | 1077 | if (e) { |
021a1e78 | 1078 | r = sd_bus_set_address(b, e); |
de1c301e | 1079 | if (r < 0) |
021a1e78 | 1080 | goto fail; |
89ffcd2a | 1081 | } else { |
6c03089c | 1082 | e = secure_getenv("XDG_RUNTIME_DIR"); |
021a1e78 LP |
1083 | if (!e) { |
1084 | r = -ENOENT; | |
1085 | goto fail; | |
1086 | } | |
de1c301e | 1087 | |
89ffcd2a | 1088 | l = strlen(e); |
021a1e78 LP |
1089 | if (l + 4 > sizeof(b->sockaddr.un.sun_path)) { |
1090 | r = -E2BIG; | |
1091 | goto fail; | |
1092 | } | |
de1c301e | 1093 | |
89ffcd2a LP |
1094 | b->sockaddr.un.sun_family = AF_UNIX; |
1095 | memcpy(mempcpy(b->sockaddr.un.sun_path, e, l), "/bus", 4); | |
1096 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l + 4; | |
de1c301e LP |
1097 | } |
1098 | ||
94bbf1ba | 1099 | b->bus_client = true; |
de1c301e | 1100 | |
021a1e78 | 1101 | r = sd_bus_start(b); |
2571ead1 LP |
1102 | if (r < 0) |
1103 | goto fail; | |
de1c301e LP |
1104 | |
1105 | *ret = b; | |
1106 | return 0; | |
2571ead1 LP |
1107 | |
1108 | fail: | |
021a1e78 | 1109 | bus_free(b); |
2571ead1 | 1110 | return r; |
de1c301e LP |
1111 | } |
1112 | ||
d9f644e2 | 1113 | _public_ int sd_bus_open_system_remote(const char *host, sd_bus **ret) { |
0f8bd8de LP |
1114 | _cleanup_free_ char *e = NULL; |
1115 | char *p = NULL; | |
1116 | sd_bus *bus; | |
1117 | int r; | |
1118 | ||
1119 | assert_return(host, -EINVAL); | |
1120 | assert_return(ret, -EINVAL); | |
1121 | ||
1122 | e = bus_address_escape(host); | |
1123 | if (!e) | |
1124 | return -ENOMEM; | |
1125 | ||
1126 | p = strjoin("unixexec:path=ssh,argv1=-xT,argv2=", e, ",argv3=systemd-stdio-bridge", NULL); | |
1127 | if (!p) | |
1128 | return -ENOMEM; | |
a7893c6b LP |
1129 | |
1130 | r = sd_bus_new(&bus); | |
1131 | if (r < 0) { | |
1132 | free(p); | |
1133 | return r; | |
1134 | } | |
1135 | ||
1136 | bus->address = p; | |
1137 | bus->bus_client = true; | |
1138 | ||
1139 | r = sd_bus_start(bus); | |
1140 | if (r < 0) { | |
1141 | bus_free(bus); | |
1142 | return r; | |
1143 | } | |
1144 | ||
1145 | *ret = bus; | |
1146 | return 0; | |
1147 | } | |
1148 | ||
d9f644e2 | 1149 | _public_ int sd_bus_open_system_container(const char *machine, sd_bus **ret) { |
a7893c6b LP |
1150 | _cleanup_free_ char *e = NULL; |
1151 | sd_bus *bus; | |
1152 | char *p; | |
1153 | int r; | |
1154 | ||
1155 | assert_return(machine, -EINVAL); | |
1156 | assert_return(ret, -EINVAL); | |
1157 | ||
1158 | e = bus_address_escape(machine); | |
1159 | if (!e) | |
1160 | return -ENOMEM; | |
1161 | ||
1162 | p = strjoin("x-container:machine=", e, NULL); | |
1163 | if (!p) | |
1164 | return -ENOMEM; | |
0f8bd8de LP |
1165 | |
1166 | r = sd_bus_new(&bus); | |
1167 | if (r < 0) { | |
1168 | free(p); | |
1169 | return r; | |
1170 | } | |
1171 | ||
1172 | bus->address = p; | |
1173 | bus->bus_client = true; | |
1174 | ||
1175 | r = sd_bus_start(bus); | |
1176 | if (r < 0) { | |
1177 | bus_free(bus); | |
1178 | return r; | |
1179 | } | |
1180 | ||
1181 | *ret = bus; | |
1182 | return 0; | |
1183 | } | |
1184 | ||
d9f644e2 | 1185 | _public_ void sd_bus_close(sd_bus *bus) { |
de1c301e LP |
1186 | if (!bus) |
1187 | return; | |
d5a2b9a6 LP |
1188 | if (bus->state == BUS_CLOSED) |
1189 | return; | |
1190 | if (bus_pid_changed(bus)) | |
f54514f3 LP |
1191 | return; |
1192 | ||
1193 | bus->state = BUS_CLOSED; | |
e82c9509 | 1194 | |
40ca29a1 LP |
1195 | sd_bus_detach_event(bus); |
1196 | ||
f54514f3 LP |
1197 | if (!bus->is_kernel) |
1198 | bus_close_fds(bus); | |
1199 | ||
1200 | /* We'll leave the fd open in case this is a kernel bus, since | |
1201 | * there might still be memblocks around that reference this | |
1202 | * bus, and they might need to invoke the | |
1203 | * KDBUS_CMD_MSG_RELEASE ioctl on the fd when they are | |
1204 | * freed. */ | |
de1c301e LP |
1205 | } |
1206 | ||
d9f644e2 | 1207 | _public_ sd_bus *sd_bus_ref(sd_bus *bus) { |
9d6c7c82 | 1208 | assert_return(bus, NULL); |
de1c301e | 1209 | |
e4ee6e5c | 1210 | assert_se(REFCNT_INC(bus->n_ref) >= 2); |
de1c301e | 1211 | |
de1c301e LP |
1212 | return bus; |
1213 | } | |
1214 | ||
d9f644e2 | 1215 | _public_ sd_bus *sd_bus_unref(sd_bus *bus) { |
9d6c7c82 | 1216 | assert_return(bus, NULL); |
de1c301e | 1217 | |
e4ee6e5c | 1218 | if (REFCNT_DEC(bus->n_ref) <= 0) |
de1c301e LP |
1219 | bus_free(bus); |
1220 | ||
1221 | return NULL; | |
1222 | } | |
1223 | ||
d9f644e2 | 1224 | _public_ int sd_bus_is_open(sd_bus *bus) { |
d6888822 LP |
1225 | |
1226 | assert_return(bus, -EINVAL); | |
1227 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
e3017af9 | 1228 | |
f54514f3 | 1229 | return BUS_IS_OPEN(bus->state); |
e3017af9 LP |
1230 | } |
1231 | ||
d9f644e2 | 1232 | _public_ int sd_bus_can_send(sd_bus *bus, char type) { |
d728d708 LP |
1233 | int r; |
1234 | ||
d6888822 LP |
1235 | assert_return(bus, -EINVAL); |
1236 | assert_return(bus->state != BUS_UNSET, -ENOTCONN); | |
1237 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 1238 | |
d728d708 | 1239 | if (type == SD_BUS_TYPE_UNIX_FD) { |
264ad849 | 1240 | if (!(bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) |
021a1e78 LP |
1241 | return 0; |
1242 | ||
20902f3e | 1243 | r = bus_ensure_running(bus); |
d728d708 LP |
1244 | if (r < 0) |
1245 | return r; | |
de1c301e | 1246 | |
d728d708 LP |
1247 | return bus->can_fds; |
1248 | } | |
1249 | ||
1250 | return bus_type_is_valid(type); | |
de1c301e LP |
1251 | } |
1252 | ||
d9f644e2 | 1253 | _public_ int sd_bus_get_server_id(sd_bus *bus, sd_id128_t *server_id) { |
d728d708 | 1254 | int r; |
de1c301e | 1255 | |
d6888822 LP |
1256 | assert_return(bus, -EINVAL); |
1257 | assert_return(server_id, -EINVAL); | |
1258 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 1259 | |
20902f3e | 1260 | r = bus_ensure_running(bus); |
d728d708 LP |
1261 | if (r < 0) |
1262 | return r; | |
de1c301e | 1263 | |
98178d39 | 1264 | *server_id = bus->server_id; |
d728d708 | 1265 | return 0; |
de1c301e LP |
1266 | } |
1267 | ||
1268 | static int bus_seal_message(sd_bus *b, sd_bus_message *m) { | |
1269 | assert(m); | |
1270 | ||
89ffcd2a LP |
1271 | if (m->header->version > b->message_version) |
1272 | return -EPERM; | |
1273 | ||
aea93deb LP |
1274 | if (m->sealed) { |
1275 | /* If we copy the same message to multiple | |
1276 | * destinations, avoid using the same serial | |
1277 | * numbers. */ | |
1278 | b->serial = MAX(b->serial, BUS_MESSAGE_SERIAL(m)); | |
de1c301e | 1279 | return 0; |
aea93deb | 1280 | } |
de1c301e | 1281 | |
9a17484d | 1282 | return bus_message_seal(m, ++b->serial); |
de1c301e LP |
1283 | } |
1284 | ||
de1c301e | 1285 | static int dispatch_wqueue(sd_bus *bus) { |
e3017af9 | 1286 | int r, ret = 0; |
de1c301e LP |
1287 | |
1288 | assert(bus); | |
89ffcd2a | 1289 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
de1c301e | 1290 | |
de1c301e LP |
1291 | while (bus->wqueue_size > 0) { |
1292 | ||
6629161f LP |
1293 | if (bus->is_kernel) |
1294 | r = bus_kernel_write_message(bus, bus->wqueue[0]); | |
1295 | else | |
1296 | r = bus_socket_write_message(bus, bus->wqueue[0], &bus->windex); | |
1297 | ||
de1c301e LP |
1298 | if (r < 0) { |
1299 | sd_bus_close(bus); | |
1300 | return r; | |
1301 | } else if (r == 0) | |
e3017af9 LP |
1302 | /* Didn't do anything this time */ |
1303 | return ret; | |
6629161f | 1304 | else if (bus->is_kernel || bus->windex >= BUS_MESSAGE_SIZE(bus->wqueue[0])) { |
de1c301e LP |
1305 | /* Fully written. Let's drop the entry from |
1306 | * the queue. | |
1307 | * | |
1308 | * This isn't particularly optimized, but | |
1309 | * well, this is supposed to be our worst-case | |
1310 | * buffer only, and the socket buffer is | |
1311 | * supposed to be our primary buffer, and if | |
1312 | * it got full, then all bets are off | |
1313 | * anyway. */ | |
1314 | ||
1315 | sd_bus_message_unref(bus->wqueue[0]); | |
1316 | bus->wqueue_size --; | |
1317 | memmove(bus->wqueue, bus->wqueue + 1, sizeof(sd_bus_message*) * bus->wqueue_size); | |
1318 | bus->windex = 0; | |
1319 | ||
e3017af9 | 1320 | ret = 1; |
de1c301e LP |
1321 | } |
1322 | } | |
1323 | ||
e3017af9 | 1324 | return ret; |
de1c301e LP |
1325 | } |
1326 | ||
1327 | static int dispatch_rqueue(sd_bus *bus, sd_bus_message **m) { | |
2bf938c1 | 1328 | sd_bus_message *z = NULL; |
e3017af9 | 1329 | int r, ret = 0; |
de1c301e LP |
1330 | |
1331 | assert(bus); | |
1332 | assert(m); | |
89ffcd2a | 1333 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
de1c301e | 1334 | |
de1c301e LP |
1335 | if (bus->rqueue_size > 0) { |
1336 | /* Dispatch a queued message */ | |
1337 | ||
1338 | *m = bus->rqueue[0]; | |
1339 | bus->rqueue_size --; | |
1340 | memmove(bus->rqueue, bus->rqueue + 1, sizeof(sd_bus_message*) * bus->rqueue_size); | |
1341 | return 1; | |
1342 | } | |
1343 | ||
1344 | /* Try to read a new message */ | |
e3017af9 | 1345 | do { |
6629161f LP |
1346 | if (bus->is_kernel) |
1347 | r = bus_kernel_read_message(bus, &z); | |
1348 | else | |
1349 | r = bus_socket_read_message(bus, &z); | |
1350 | ||
e3017af9 LP |
1351 | if (r < 0) { |
1352 | sd_bus_close(bus); | |
1353 | return r; | |
1354 | } | |
1355 | if (r == 0) | |
1356 | return ret; | |
de1c301e | 1357 | |
2e8d788c | 1358 | ret = 1; |
e3017af9 LP |
1359 | } while (!z); |
1360 | ||
1361 | *m = z; | |
2e8d788c | 1362 | return ret; |
de1c301e LP |
1363 | } |
1364 | ||
d9f644e2 | 1365 | _public_ int sd_bus_send(sd_bus *bus, sd_bus_message *m, uint64_t *serial) { |
de1c301e LP |
1366 | int r; |
1367 | ||
d6888822 LP |
1368 | assert_return(bus, -EINVAL); |
1369 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
1370 | assert_return(m, -EINVAL); | |
1371 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
1372 | |
1373 | if (m->n_fds > 0) { | |
1374 | r = sd_bus_can_send(bus, SD_BUS_TYPE_UNIX_FD); | |
1375 | if (r < 0) | |
1376 | return r; | |
1377 | if (r == 0) | |
1378 | return -ENOTSUP; | |
1379 | } | |
de1c301e | 1380 | |
29f6aadd LP |
1381 | /* If the serial number isn't kept, then we know that no reply |
1382 | * is expected */ | |
1383 | if (!serial && !m->sealed) | |
1384 | m->header->flags |= SD_BUS_MESSAGE_NO_REPLY_EXPECTED; | |
1385 | ||
de1c301e LP |
1386 | r = bus_seal_message(bus, m); |
1387 | if (r < 0) | |
1388 | return r; | |
1389 | ||
5407f2de LP |
1390 | /* If this is a reply and no reply was requested, then let's |
1391 | * suppress this, if we can */ | |
1392 | if (m->dont_send && !serial) | |
7a37d625 | 1393 | return 1; |
5407f2de | 1394 | |
89ffcd2a | 1395 | if ((bus->state == BUS_RUNNING || bus->state == BUS_HELLO) && bus->wqueue_size <= 0) { |
de1c301e LP |
1396 | size_t idx = 0; |
1397 | ||
6629161f LP |
1398 | if (bus->is_kernel) |
1399 | r = bus_kernel_write_message(bus, m); | |
1400 | else | |
1401 | r = bus_socket_write_message(bus, m, &idx); | |
1402 | ||
de1c301e LP |
1403 | if (r < 0) { |
1404 | sd_bus_close(bus); | |
1405 | return r; | |
6629161f | 1406 | } else if (!bus->is_kernel && idx < BUS_MESSAGE_SIZE(m)) { |
de1c301e LP |
1407 | /* Wasn't fully written. So let's remember how |
1408 | * much was written. Note that the first entry | |
1409 | * of the wqueue array is always allocated so | |
1410 | * that we always can remember how much was | |
1411 | * written. */ | |
1412 | bus->wqueue[0] = sd_bus_message_ref(m); | |
1413 | bus->wqueue_size = 1; | |
1414 | bus->windex = idx; | |
1415 | } | |
1416 | } else { | |
1417 | sd_bus_message **q; | |
1418 | ||
1419 | /* Just append it to the queue. */ | |
1420 | ||
25220239 | 1421 | if (bus->wqueue_size >= BUS_WQUEUE_MAX) |
de1c301e LP |
1422 | return -ENOBUFS; |
1423 | ||
1424 | q = realloc(bus->wqueue, sizeof(sd_bus_message*) * (bus->wqueue_size + 1)); | |
1425 | if (!q) | |
1426 | return -ENOMEM; | |
1427 | ||
1428 | bus->wqueue = q; | |
1429 | q[bus->wqueue_size ++] = sd_bus_message_ref(m); | |
1430 | } | |
1431 | ||
1432 | if (serial) | |
1433 | *serial = BUS_MESSAGE_SERIAL(m); | |
1434 | ||
7a37d625 | 1435 | return 1; |
de1c301e LP |
1436 | } |
1437 | ||
1438 | static usec_t calc_elapse(uint64_t usec) { | |
1439 | if (usec == (uint64_t) -1) | |
1440 | return 0; | |
1441 | ||
1442 | if (usec == 0) | |
e3017af9 | 1443 | usec = BUS_DEFAULT_TIMEOUT; |
de1c301e LP |
1444 | |
1445 | return now(CLOCK_MONOTONIC) + usec; | |
1446 | } | |
1447 | ||
e3017af9 LP |
1448 | static int timeout_compare(const void *a, const void *b) { |
1449 | const struct reply_callback *x = a, *y = b; | |
1450 | ||
1451 | if (x->timeout != 0 && y->timeout == 0) | |
1452 | return -1; | |
1453 | ||
1454 | if (x->timeout == 0 && y->timeout != 0) | |
1455 | return 1; | |
1456 | ||
1457 | if (x->timeout < y->timeout) | |
1458 | return -1; | |
1459 | ||
1460 | if (x->timeout > y->timeout) | |
1461 | return 1; | |
1462 | ||
1463 | return 0; | |
1464 | } | |
1465 | ||
c49b30a2 | 1466 | _public_ int sd_bus_call_async( |
de1c301e LP |
1467 | sd_bus *bus, |
1468 | sd_bus_message *m, | |
52f3ba91 | 1469 | sd_bus_message_handler_t callback, |
de1c301e LP |
1470 | void *userdata, |
1471 | uint64_t usec, | |
1472 | uint64_t *serial) { | |
1473 | ||
1474 | struct reply_callback *c; | |
1475 | int r; | |
1476 | ||
d6888822 LP |
1477 | assert_return(bus, -EINVAL); |
1478 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
1479 | assert_return(m, -EINVAL); | |
40ca29a1 | 1480 | assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL); |
d6888822 LP |
1481 | assert_return(!(m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL); |
1482 | assert_return(callback, -EINVAL); | |
1483 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
89ffcd2a LP |
1484 | |
1485 | r = hashmap_ensure_allocated(&bus->reply_callbacks, uint64_hash_func, uint64_compare_func); | |
1486 | if (r < 0) | |
1487 | return r; | |
de1c301e | 1488 | |
e3017af9 LP |
1489 | if (usec != (uint64_t) -1) { |
1490 | r = prioq_ensure_allocated(&bus->reply_callbacks_prioq, timeout_compare); | |
1491 | if (r < 0) | |
1492 | return r; | |
1493 | } | |
1494 | ||
de1c301e LP |
1495 | r = bus_seal_message(bus, m); |
1496 | if (r < 0) | |
1497 | return r; | |
1498 | ||
eba8617e | 1499 | c = new0(struct reply_callback, 1); |
de1c301e LP |
1500 | if (!c) |
1501 | return -ENOMEM; | |
1502 | ||
1503 | c->callback = callback; | |
1504 | c->userdata = userdata; | |
1505 | c->serial = BUS_MESSAGE_SERIAL(m); | |
1506 | c->timeout = calc_elapse(usec); | |
1507 | ||
1508 | r = hashmap_put(bus->reply_callbacks, &c->serial, c); | |
1509 | if (r < 0) { | |
1510 | free(c); | |
1511 | return r; | |
1512 | } | |
1513 | ||
e3017af9 LP |
1514 | if (c->timeout != 0) { |
1515 | r = prioq_put(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
1516 | if (r < 0) { | |
1517 | c->timeout = 0; | |
c49b30a2 | 1518 | sd_bus_call_async_cancel(bus, c->serial); |
e3017af9 LP |
1519 | return r; |
1520 | } | |
1521 | } | |
1522 | ||
de1c301e LP |
1523 | r = sd_bus_send(bus, m, serial); |
1524 | if (r < 0) { | |
c49b30a2 | 1525 | sd_bus_call_async_cancel(bus, c->serial); |
de1c301e LP |
1526 | return r; |
1527 | } | |
1528 | ||
1529 | return r; | |
1530 | } | |
1531 | ||
c49b30a2 | 1532 | _public_ int sd_bus_call_async_cancel(sd_bus *bus, uint64_t serial) { |
e3017af9 | 1533 | struct reply_callback *c; |
de1c301e | 1534 | |
d6888822 LP |
1535 | assert_return(bus, -EINVAL); |
1536 | assert_return(serial != 0, -EINVAL); | |
1537 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e LP |
1538 | |
1539 | c = hashmap_remove(bus->reply_callbacks, &serial); | |
1540 | if (!c) | |
1541 | return 0; | |
1542 | ||
e3017af9 LP |
1543 | if (c->timeout != 0) |
1544 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
1545 | ||
de1c301e LP |
1546 | free(c); |
1547 | return 1; | |
1548 | } | |
1549 | ||
20902f3e | 1550 | int bus_ensure_running(sd_bus *bus) { |
89ffcd2a LP |
1551 | int r; |
1552 | ||
1553 | assert(bus); | |
1554 | ||
f54514f3 | 1555 | if (bus->state == BUS_UNSET || bus->state == BUS_CLOSED) |
021a1e78 | 1556 | return -ENOTCONN; |
d728d708 LP |
1557 | if (bus->state == BUS_RUNNING) |
1558 | return 1; | |
89ffcd2a LP |
1559 | |
1560 | for (;;) { | |
1561 | r = sd_bus_process(bus, NULL); | |
1562 | if (r < 0) | |
1563 | return r; | |
d728d708 LP |
1564 | if (bus->state == BUS_RUNNING) |
1565 | return 1; | |
e3017af9 LP |
1566 | if (r > 0) |
1567 | continue; | |
89ffcd2a LP |
1568 | |
1569 | r = sd_bus_wait(bus, (uint64_t) -1); | |
1570 | if (r < 0) | |
1571 | return r; | |
1572 | } | |
1573 | } | |
1574 | ||
c49b30a2 | 1575 | _public_ int sd_bus_call( |
de1c301e LP |
1576 | sd_bus *bus, |
1577 | sd_bus_message *m, | |
1578 | uint64_t usec, | |
1579 | sd_bus_error *error, | |
1580 | sd_bus_message **reply) { | |
1581 | ||
1582 | int r; | |
1583 | usec_t timeout; | |
1584 | uint64_t serial; | |
1585 | bool room = false; | |
1586 | ||
d6888822 LP |
1587 | assert_return(bus, -EINVAL); |
1588 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
1589 | assert_return(m, -EINVAL); | |
40ca29a1 | 1590 | assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL); |
d6888822 LP |
1591 | assert_return(!(m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL); |
1592 | assert_return(!bus_error_is_dirty(error), -EINVAL); | |
1593 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
89ffcd2a | 1594 | |
20902f3e | 1595 | r = bus_ensure_running(bus); |
89ffcd2a LP |
1596 | if (r < 0) |
1597 | return r; | |
de1c301e LP |
1598 | |
1599 | r = sd_bus_send(bus, m, &serial); | |
1600 | if (r < 0) | |
1601 | return r; | |
1602 | ||
1603 | timeout = calc_elapse(usec); | |
1604 | ||
1605 | for (;;) { | |
1606 | usec_t left; | |
e3017af9 | 1607 | sd_bus_message *incoming = NULL; |
de1c301e LP |
1608 | |
1609 | if (!room) { | |
1610 | sd_bus_message **q; | |
1611 | ||
25220239 LP |
1612 | if (bus->rqueue_size >= BUS_RQUEUE_MAX) |
1613 | return -ENOBUFS; | |
1614 | ||
de1c301e LP |
1615 | /* Make sure there's room for queuing this |
1616 | * locally, before we read the message */ | |
1617 | ||
1618 | q = realloc(bus->rqueue, (bus->rqueue_size + 1) * sizeof(sd_bus_message*)); | |
1619 | if (!q) | |
1620 | return -ENOMEM; | |
1621 | ||
1622 | bus->rqueue = q; | |
1623 | room = true; | |
1624 | } | |
1625 | ||
6629161f LP |
1626 | if (bus->is_kernel) |
1627 | r = bus_kernel_read_message(bus, &incoming); | |
1628 | else | |
1629 | r = bus_socket_read_message(bus, &incoming); | |
de1c301e LP |
1630 | if (r < 0) |
1631 | return r; | |
e3017af9 | 1632 | if (incoming) { |
89ffcd2a | 1633 | |
de1c301e LP |
1634 | if (incoming->reply_serial == serial) { |
1635 | /* Found a match! */ | |
1636 | ||
40ca29a1 | 1637 | if (incoming->header->type == SD_BUS_MESSAGE_METHOD_RETURN) { |
b7f247e0 LP |
1638 | |
1639 | if (reply) | |
1640 | *reply = incoming; | |
1641 | else | |
1642 | sd_bus_message_unref(incoming); | |
1643 | ||
7a37d625 | 1644 | return 1; |
de1c301e LP |
1645 | } |
1646 | ||
40ca29a1 | 1647 | if (incoming->header->type == SD_BUS_MESSAGE_METHOD_ERROR) { |
de1c301e LP |
1648 | int k; |
1649 | ||
1650 | r = sd_bus_error_copy(error, &incoming->error); | |
1651 | if (r < 0) { | |
1652 | sd_bus_message_unref(incoming); | |
1653 | return r; | |
1654 | } | |
1655 | ||
40ca29a1 | 1656 | k = sd_bus_error_get_errno(&incoming->error); |
de1c301e | 1657 | sd_bus_message_unref(incoming); |
40ca29a1 | 1658 | return -k; |
de1c301e LP |
1659 | } |
1660 | ||
1661 | sd_bus_message_unref(incoming); | |
1662 | return -EIO; | |
a8a07f89 LP |
1663 | |
1664 | } else if (incoming->header->serial == serial && | |
1665 | bus->unique_name && | |
1666 | incoming->sender && | |
1667 | streq(bus->unique_name, incoming->sender)) { | |
1668 | ||
1669 | /* Our own message? Somebody is trying | |
1670 | * to send its own client a message, | |
1671 | * let's not dead-lock, let's fail | |
1672 | * immediately. */ | |
1673 | ||
1674 | sd_bus_message_unref(incoming); | |
1675 | return -ELOOP; | |
de1c301e LP |
1676 | } |
1677 | ||
1678 | /* There's already guaranteed to be room for | |
1679 | * this, so need to resize things here */ | |
1680 | bus->rqueue[bus->rqueue_size ++] = incoming; | |
1681 | room = false; | |
1682 | ||
1683 | /* Try to read more, right-away */ | |
1684 | continue; | |
1685 | } | |
e3017af9 LP |
1686 | if (r != 0) |
1687 | continue; | |
de1c301e LP |
1688 | |
1689 | if (timeout > 0) { | |
1690 | usec_t n; | |
1691 | ||
1692 | n = now(CLOCK_MONOTONIC); | |
1693 | if (n >= timeout) | |
1694 | return -ETIMEDOUT; | |
1695 | ||
1696 | left = timeout - n; | |
1697 | } else | |
1698 | left = (uint64_t) -1; | |
1699 | ||
e3017af9 | 1700 | r = bus_poll(bus, true, left); |
de1c301e LP |
1701 | if (r < 0) |
1702 | return r; | |
1703 | ||
1704 | r = dispatch_wqueue(bus); | |
1705 | if (r < 0) | |
1706 | return r; | |
1707 | } | |
1708 | } | |
1709 | ||
d9f644e2 | 1710 | _public_ int sd_bus_get_fd(sd_bus *bus) { |
d6888822 LP |
1711 | |
1712 | assert_return(bus, -EINVAL); | |
1713 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
1714 | assert_return(bus->input_fd == bus->output_fd, -EPERM); | |
1715 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 1716 | |
e82c9509 | 1717 | return bus->input_fd; |
de1c301e LP |
1718 | } |
1719 | ||
d9f644e2 | 1720 | _public_ int sd_bus_get_events(sd_bus *bus) { |
de1c301e LP |
1721 | int flags = 0; |
1722 | ||
d6888822 LP |
1723 | assert_return(bus, -EINVAL); |
1724 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
1725 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e LP |
1726 | |
1727 | if (bus->state == BUS_OPENING) | |
1728 | flags |= POLLOUT; | |
89ffcd2a LP |
1729 | else if (bus->state == BUS_AUTHENTICATING) { |
1730 | ||
2181a7f5 | 1731 | if (bus_socket_auth_needs_write(bus)) |
89ffcd2a LP |
1732 | flags |= POLLOUT; |
1733 | ||
1734 | flags |= POLLIN; | |
1735 | ||
1736 | } else if (bus->state == BUS_RUNNING || bus->state == BUS_HELLO) { | |
de1c301e LP |
1737 | if (bus->rqueue_size <= 0) |
1738 | flags |= POLLIN; | |
1739 | if (bus->wqueue_size > 0) | |
1740 | flags |= POLLOUT; | |
1741 | } | |
1742 | ||
1743 | return flags; | |
1744 | } | |
1745 | ||
d9f644e2 | 1746 | _public_ int sd_bus_get_timeout(sd_bus *bus, uint64_t *timeout_usec) { |
e3017af9 LP |
1747 | struct reply_callback *c; |
1748 | ||
d6888822 LP |
1749 | assert_return(bus, -EINVAL); |
1750 | assert_return(timeout_usec, -EINVAL); | |
1751 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
1752 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
e3017af9 LP |
1753 | |
1754 | if (bus->state == BUS_AUTHENTICATING) { | |
1755 | *timeout_usec = bus->auth_timeout; | |
1756 | return 1; | |
1757 | } | |
1758 | ||
adee69fa LP |
1759 | if (bus->state != BUS_RUNNING && bus->state != BUS_HELLO) { |
1760 | *timeout_usec = (uint64_t) -1; | |
e3017af9 | 1761 | return 0; |
adee69fa | 1762 | } |
e3017af9 | 1763 | |
8efd6381 LP |
1764 | if (bus->rqueue_size > 0) { |
1765 | *timeout_usec = 0; | |
1766 | return 1; | |
1767 | } | |
1768 | ||
e3017af9 | 1769 | c = prioq_peek(bus->reply_callbacks_prioq); |
adee69fa LP |
1770 | if (!c) { |
1771 | *timeout_usec = (uint64_t) -1; | |
e3017af9 | 1772 | return 0; |
adee69fa | 1773 | } |
e3017af9 LP |
1774 | |
1775 | *timeout_usec = c->timeout; | |
1776 | return 1; | |
1777 | } | |
1778 | ||
1779 | static int process_timeout(sd_bus *bus) { | |
eb01ba5d | 1780 | _cleanup_bus_message_unref_ sd_bus_message* m = NULL; |
e3017af9 LP |
1781 | struct reply_callback *c; |
1782 | usec_t n; | |
1783 | int r; | |
1784 | ||
1785 | assert(bus); | |
1786 | ||
1787 | c = prioq_peek(bus->reply_callbacks_prioq); | |
1788 | if (!c) | |
1789 | return 0; | |
1790 | ||
1791 | n = now(CLOCK_MONOTONIC); | |
1792 | if (c->timeout > n) | |
1793 | return 0; | |
1794 | ||
eb01ba5d LP |
1795 | r = bus_message_new_synthetic_error( |
1796 | bus, | |
1797 | c->serial, | |
40ca29a1 | 1798 | &SD_BUS_ERROR_MAKE(SD_BUS_ERROR_NO_REPLY, "Method call timed out"), |
eb01ba5d LP |
1799 | &m); |
1800 | if (r < 0) | |
1801 | return r; | |
1802 | ||
e3017af9 LP |
1803 | assert_se(prioq_pop(bus->reply_callbacks_prioq) == c); |
1804 | hashmap_remove(bus->reply_callbacks, &c->serial); | |
1805 | ||
eb01ba5d | 1806 | r = c->callback(bus, m, c->userdata); |
e3017af9 LP |
1807 | free(c); |
1808 | ||
1809 | return r < 0 ? r : 1; | |
1810 | } | |
1811 | ||
9d373862 LP |
1812 | static int process_hello(sd_bus *bus, sd_bus_message *m) { |
1813 | assert(bus); | |
1814 | assert(m); | |
1815 | ||
1816 | if (bus->state != BUS_HELLO) | |
1817 | return 0; | |
1818 | ||
1819 | /* Let's make sure the first message on the bus is the HELLO | |
1820 | * reply. But note that we don't actually parse the message | |
2181a7f5 LP |
1821 | * here (we leave that to the usual handling), we just verify |
1822 | * we don't let any earlier msg through. */ | |
9d373862 | 1823 | |
40ca29a1 LP |
1824 | if (m->header->type != SD_BUS_MESSAGE_METHOD_RETURN && |
1825 | m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) | |
9d373862 LP |
1826 | return -EIO; |
1827 | ||
1828 | if (m->reply_serial != bus->hello_serial) | |
1829 | return -EIO; | |
1830 | ||
1831 | return 0; | |
1832 | } | |
1833 | ||
a652755d LP |
1834 | static int process_reply(sd_bus *bus, sd_bus_message *m) { |
1835 | struct reply_callback *c; | |
1836 | int r; | |
1837 | ||
1838 | assert(bus); | |
1839 | assert(m); | |
1840 | ||
40ca29a1 LP |
1841 | if (m->header->type != SD_BUS_MESSAGE_METHOD_RETURN && |
1842 | m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) | |
a652755d LP |
1843 | return 0; |
1844 | ||
1845 | c = hashmap_remove(bus->reply_callbacks, &m->reply_serial); | |
1846 | if (!c) | |
1847 | return 0; | |
1848 | ||
1849 | if (c->timeout != 0) | |
1850 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
1851 | ||
88fe224c LP |
1852 | r = sd_bus_message_rewind(m, true); |
1853 | if (r < 0) | |
1854 | return r; | |
1855 | ||
eb01ba5d | 1856 | r = c->callback(bus, m, c->userdata); |
a652755d LP |
1857 | free(c); |
1858 | ||
1859 | return r; | |
1860 | } | |
1861 | ||
1862 | static int process_filter(sd_bus *bus, sd_bus_message *m) { | |
1863 | struct filter_callback *l; | |
1864 | int r; | |
1865 | ||
392d5b37 LP |
1866 | assert(bus); |
1867 | assert(m); | |
1868 | ||
7286037f LP |
1869 | do { |
1870 | bus->filter_callbacks_modified = false; | |
1871 | ||
1872 | LIST_FOREACH(callbacks, l, bus->filter_callbacks) { | |
1873 | ||
1874 | if (bus->filter_callbacks_modified) | |
1875 | break; | |
1876 | ||
1877 | /* Don't run this more than once per iteration */ | |
1878 | if (l->last_iteration == bus->iteration_counter) | |
1879 | continue; | |
1880 | ||
1881 | l->last_iteration = bus->iteration_counter; | |
1882 | ||
88fe224c LP |
1883 | r = sd_bus_message_rewind(m, true); |
1884 | if (r < 0) | |
1885 | return r; | |
1886 | ||
eb01ba5d | 1887 | r = l->callback(bus, m, l->userdata); |
7286037f LP |
1888 | if (r != 0) |
1889 | return r; | |
1890 | ||
1891 | } | |
1892 | ||
1893 | } while (bus->filter_callbacks_modified); | |
a652755d LP |
1894 | |
1895 | return 0; | |
1896 | } | |
1897 | ||
392d5b37 | 1898 | static int process_match(sd_bus *bus, sd_bus_message *m) { |
7286037f LP |
1899 | int r; |
1900 | ||
392d5b37 LP |
1901 | assert(bus); |
1902 | assert(m); | |
1903 | ||
7286037f LP |
1904 | do { |
1905 | bus->match_callbacks_modified = false; | |
1906 | ||
eb01ba5d | 1907 | r = bus_match_run(bus, &bus->match_callbacks, m); |
7286037f LP |
1908 | if (r != 0) |
1909 | return r; | |
1910 | ||
1911 | } while (bus->match_callbacks_modified); | |
1912 | ||
1913 | return 0; | |
392d5b37 LP |
1914 | } |
1915 | ||
b9bf7e2b LP |
1916 | static int process_builtin(sd_bus *bus, sd_bus_message *m) { |
1917 | _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; | |
1918 | int r; | |
1919 | ||
1920 | assert(bus); | |
1921 | assert(m); | |
1922 | ||
40ca29a1 | 1923 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) |
b9bf7e2b LP |
1924 | return 0; |
1925 | ||
1926 | if (!streq_ptr(m->interface, "org.freedesktop.DBus.Peer")) | |
1927 | return 0; | |
1928 | ||
1929 | if (m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED) | |
1930 | return 1; | |
1931 | ||
1932 | if (streq_ptr(m->member, "Ping")) | |
1933 | r = sd_bus_message_new_method_return(bus, m, &reply); | |
1934 | else if (streq_ptr(m->member, "GetMachineId")) { | |
1935 | sd_id128_t id; | |
1936 | char sid[33]; | |
1937 | ||
1938 | r = sd_id128_get_machine(&id); | |
1939 | if (r < 0) | |
1940 | return r; | |
1941 | ||
1942 | r = sd_bus_message_new_method_return(bus, m, &reply); | |
1943 | if (r < 0) | |
1944 | return r; | |
1945 | ||
1946 | r = sd_bus_message_append(reply, "s", sd_id128_to_string(id, sid)); | |
1947 | } else { | |
29ddb38f LP |
1948 | r = sd_bus_message_new_method_errorf( |
1949 | bus, m, &reply, | |
40ca29a1 | 1950 | SD_BUS_ERROR_UNKNOWN_METHOD, |
b9bf7e2b | 1951 | "Unknown method '%s' on interface '%s'.", m->member, m->interface); |
b9bf7e2b LP |
1952 | } |
1953 | ||
1954 | if (r < 0) | |
1955 | return r; | |
1956 | ||
1957 | r = sd_bus_send(bus, reply, NULL); | |
1958 | if (r < 0) | |
1959 | return r; | |
1960 | ||
1961 | return 1; | |
1962 | } | |
1963 | ||
992c052c | 1964 | static int process_message(sd_bus *bus, sd_bus_message *m) { |
e3017af9 LP |
1965 | int r; |
1966 | ||
1967 | assert(bus); | |
992c052c | 1968 | assert(m); |
e3017af9 | 1969 | |
affff0b6 | 1970 | bus->current = m; |
992c052c | 1971 | bus->iteration_counter++; |
e3017af9 | 1972 | |
40ca29a1 LP |
1973 | log_debug("Got message sender=%s object=%s interface=%s member=%s", |
1974 | strna(sd_bus_message_get_sender(m)), | |
1975 | strna(sd_bus_message_get_path(m)), | |
1976 | strna(sd_bus_message_get_interface(m)), | |
1977 | strna(sd_bus_message_get_member(m))); | |
1978 | ||
992c052c LP |
1979 | r = process_hello(bus, m); |
1980 | if (r != 0) | |
affff0b6 | 1981 | goto finish; |
a652755d | 1982 | |
992c052c LP |
1983 | r = process_reply(bus, m); |
1984 | if (r != 0) | |
affff0b6 | 1985 | goto finish; |
e3017af9 | 1986 | |
992c052c LP |
1987 | r = process_filter(bus, m); |
1988 | if (r != 0) | |
affff0b6 | 1989 | goto finish; |
a652755d | 1990 | |
992c052c LP |
1991 | r = process_match(bus, m); |
1992 | if (r != 0) | |
affff0b6 | 1993 | goto finish; |
a652755d | 1994 | |
992c052c LP |
1995 | r = process_builtin(bus, m); |
1996 | if (r != 0) | |
affff0b6 LP |
1997 | goto finish; |
1998 | ||
1999 | r = bus_process_object(bus, m); | |
a652755d | 2000 | |
affff0b6 LP |
2001 | finish: |
2002 | bus->current = NULL; | |
2003 | return r; | |
29ddb38f | 2004 | } |
88fe224c | 2005 | |
992c052c LP |
2006 | static int process_running(sd_bus *bus, sd_bus_message **ret) { |
2007 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
29ddb38f | 2008 | int r; |
a652755d | 2009 | |
29ddb38f | 2010 | assert(bus); |
992c052c | 2011 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
7286037f | 2012 | |
992c052c LP |
2013 | r = process_timeout(bus); |
2014 | if (r != 0) | |
2015 | goto null_message; | |
7286037f | 2016 | |
992c052c LP |
2017 | r = dispatch_wqueue(bus); |
2018 | if (r != 0) | |
2019 | goto null_message; | |
7286037f | 2020 | |
992c052c LP |
2021 | r = dispatch_rqueue(bus, &m); |
2022 | if (r < 0) | |
2023 | return r; | |
2024 | if (!m) | |
2025 | goto null_message; | |
7286037f | 2026 | |
992c052c LP |
2027 | r = process_message(bus, m); |
2028 | if (r != 0) | |
2029 | goto null_message; | |
7286037f | 2030 | |
992c052c LP |
2031 | if (ret) { |
2032 | r = sd_bus_message_rewind(m, true); | |
29ddb38f LP |
2033 | if (r < 0) |
2034 | return r; | |
e3017af9 | 2035 | |
992c052c LP |
2036 | *ret = m; |
2037 | m = NULL; | |
2038 | return 1; | |
2039 | } | |
a652755d | 2040 | |
40ca29a1 | 2041 | if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL) { |
a652755d | 2042 | |
992c052c LP |
2043 | r = sd_bus_reply_method_errorf( |
2044 | bus, m, | |
40ca29a1 | 2045 | SD_BUS_ERROR_UNKNOWN_OBJECT, |
992c052c | 2046 | "Unknown object '%s'.", m->path); |
29ddb38f LP |
2047 | if (r < 0) |
2048 | return r; | |
2049 | } | |
e3017af9 | 2050 | |
992c052c | 2051 | return 1; |
0a72c2bd | 2052 | |
992c052c LP |
2053 | null_message: |
2054 | if (r >= 0 && ret) | |
2055 | *ret = NULL; | |
0a72c2bd | 2056 | |
992c052c | 2057 | return r; |
29ddb38f | 2058 | } |
0a72c2bd | 2059 | |
d9f644e2 | 2060 | _public_ int sd_bus_process(sd_bus *bus, sd_bus_message **ret) { |
8ce2afd6 | 2061 | BUS_DONT_DESTROY(bus); |
29ddb38f | 2062 | int r; |
0a72c2bd | 2063 | |
992c052c LP |
2064 | /* Returns 0 when we didn't do anything. This should cause the |
2065 | * caller to invoke sd_bus_wait() before returning the next | |
2066 | * time. Returns > 0 when we did something, which possibly | |
2067 | * means *ret is filled in with an unprocessed message. */ | |
0a72c2bd | 2068 | |
d6888822 LP |
2069 | assert_return(bus, -EINVAL); |
2070 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
0a72c2bd | 2071 | |
992c052c | 2072 | /* We don't allow recursively invoking sd_bus_process(). */ |
d6888822 | 2073 | assert_return(!bus->processing, -EBUSY); |
0a72c2bd | 2074 | |
992c052c | 2075 | switch (bus->state) { |
0a72c2bd | 2076 | |
992c052c LP |
2077 | case BUS_UNSET: |
2078 | case BUS_CLOSED: | |
2079 | return -ENOTCONN; | |
0a72c2bd | 2080 | |
992c052c LP |
2081 | case BUS_OPENING: |
2082 | r = bus_socket_process_opening(bus); | |
2083 | if (r < 0) | |
29ddb38f | 2084 | return r; |
992c052c LP |
2085 | if (ret) |
2086 | *ret = NULL; | |
a652755d LP |
2087 | return r; |
2088 | ||
992c052c | 2089 | case BUS_AUTHENTICATING: |
392d5b37 | 2090 | |
992c052c | 2091 | r = bus_socket_process_authenticating(bus); |
29ddb38f LP |
2092 | if (r < 0) |
2093 | return r; | |
992c052c LP |
2094 | if (ret) |
2095 | *ret = NULL; | |
2096 | return r; | |
a652755d | 2097 | |
992c052c LP |
2098 | case BUS_RUNNING: |
2099 | case BUS_HELLO: | |
0a72c2bd | 2100 | |
992c052c LP |
2101 | bus->processing = true; |
2102 | r = process_running(bus, ret); | |
2103 | bus->processing = false; | |
43a43f50 | 2104 | |
43a43f50 | 2105 | return r; |
992c052c | 2106 | } |
43a43f50 | 2107 | |
992c052c | 2108 | assert_not_reached("Unknown state"); |
e3017af9 LP |
2109 | } |
2110 | ||
992c052c LP |
2111 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec) { |
2112 | struct pollfd p[2] = {}; | |
2113 | int r, e, n; | |
2114 | struct timespec ts; | |
8efd6381 | 2115 | usec_t m = (usec_t) -1; |
adcdb374 LP |
2116 | |
2117 | assert(bus); | |
d6888822 | 2118 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); |
adcdb374 | 2119 | |
992c052c LP |
2120 | e = sd_bus_get_events(bus); |
2121 | if (e < 0) | |
2122 | return e; | |
adcdb374 | 2123 | |
992c052c | 2124 | if (need_more) |
8efd6381 LP |
2125 | /* The caller really needs some more data, he doesn't |
2126 | * care about what's already read, or any timeouts | |
2127 | * except its own.*/ | |
992c052c | 2128 | e |= POLLIN; |
992c052c | 2129 | else { |
8efd6381 LP |
2130 | usec_t until; |
2131 | /* The caller wants to process if there's something to | |
2132 | * process, but doesn't care otherwise */ | |
2133 | ||
2134 | r = sd_bus_get_timeout(bus, &until); | |
2135 | if (r < 0) | |
2136 | return r; | |
2137 | if (r > 0) { | |
2138 | usec_t nw; | |
2139 | nw = now(CLOCK_MONOTONIC); | |
2140 | m = until > nw ? until - nw : 0; | |
2141 | } | |
992c052c | 2142 | } |
adcdb374 | 2143 | |
992c052c LP |
2144 | if (timeout_usec != (uint64_t) -1 && (m == (uint64_t) -1 || timeout_usec < m)) |
2145 | m = timeout_usec; | |
adcdb374 | 2146 | |
992c052c LP |
2147 | p[0].fd = bus->input_fd; |
2148 | if (bus->output_fd == bus->input_fd) { | |
2149 | p[0].events = e; | |
2150 | n = 1; | |
2151 | } else { | |
2152 | p[0].events = e & POLLIN; | |
2153 | p[1].fd = bus->output_fd; | |
2154 | p[1].events = e & POLLOUT; | |
2155 | n = 2; | |
adcdb374 LP |
2156 | } |
2157 | ||
992c052c | 2158 | r = ppoll(p, n, m == (uint64_t) -1 ? NULL : timespec_store(&ts, m), NULL); |
adcdb374 | 2159 | if (r < 0) |
992c052c | 2160 | return -errno; |
adcdb374 | 2161 | |
992c052c | 2162 | return r > 0 ? 1 : 0; |
adcdb374 LP |
2163 | } |
2164 | ||
d9f644e2 | 2165 | _public_ int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) { |
9db76355 | 2166 | |
d6888822 LP |
2167 | assert_return(bus, -EINVAL); |
2168 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
2169 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
9db76355 | 2170 | |
992c052c LP |
2171 | if (bus->rqueue_size > 0) |
2172 | return 0; | |
9db76355 | 2173 | |
992c052c LP |
2174 | return bus_poll(bus, false, timeout_usec); |
2175 | } | |
9db76355 | 2176 | |
d9f644e2 | 2177 | _public_ int sd_bus_flush(sd_bus *bus) { |
992c052c | 2178 | int r; |
9db76355 | 2179 | |
d6888822 LP |
2180 | assert_return(bus, -EINVAL); |
2181 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
2182 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
9db76355 | 2183 | |
992c052c LP |
2184 | r = bus_ensure_running(bus); |
2185 | if (r < 0) | |
2186 | return r; | |
9db76355 | 2187 | |
992c052c LP |
2188 | if (bus->wqueue_size <= 0) |
2189 | return 0; | |
9db76355 | 2190 | |
992c052c LP |
2191 | for (;;) { |
2192 | r = dispatch_wqueue(bus); | |
9db76355 LP |
2193 | if (r < 0) |
2194 | return r; | |
2195 | ||
992c052c LP |
2196 | if (bus->wqueue_size <= 0) |
2197 | return 0; | |
9db76355 | 2198 | |
992c052c | 2199 | r = bus_poll(bus, false, (uint64_t) -1); |
9db76355 LP |
2200 | if (r < 0) |
2201 | return r; | |
9db76355 | 2202 | } |
9db76355 LP |
2203 | } |
2204 | ||
d9f644e2 ZJS |
2205 | _public_ int sd_bus_add_filter(sd_bus *bus, |
2206 | sd_bus_message_handler_t callback, | |
2207 | void *userdata) { | |
2208 | ||
992c052c | 2209 | struct filter_callback *f; |
de1c301e | 2210 | |
d6888822 LP |
2211 | assert_return(bus, -EINVAL); |
2212 | assert_return(callback, -EINVAL); | |
2213 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 2214 | |
992c052c LP |
2215 | f = new0(struct filter_callback, 1); |
2216 | if (!f) | |
29ddb38f | 2217 | return -ENOMEM; |
992c052c LP |
2218 | f->callback = callback; |
2219 | f->userdata = userdata; | |
29ddb38f | 2220 | |
992c052c | 2221 | bus->filter_callbacks_modified = true; |
71fda00f | 2222 | LIST_PREPEND(callbacks, bus->filter_callbacks, f); |
de1c301e LP |
2223 | return 0; |
2224 | } | |
a652755d | 2225 | |
d9f644e2 ZJS |
2226 | _public_ int sd_bus_remove_filter(sd_bus *bus, |
2227 | sd_bus_message_handler_t callback, | |
2228 | void *userdata) { | |
2229 | ||
992c052c | 2230 | struct filter_callback *f; |
a652755d | 2231 | |
d6888822 LP |
2232 | assert_return(bus, -EINVAL); |
2233 | assert_return(callback, -EINVAL); | |
2234 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
a652755d | 2235 | |
992c052c LP |
2236 | LIST_FOREACH(callbacks, f, bus->filter_callbacks) { |
2237 | if (f->callback == callback && f->userdata == userdata) { | |
2238 | bus->filter_callbacks_modified = true; | |
71fda00f | 2239 | LIST_REMOVE(callbacks, bus->filter_callbacks, f); |
992c052c LP |
2240 | free(f); |
2241 | return 1; | |
29ddb38f LP |
2242 | } |
2243 | } | |
2244 | ||
992c052c | 2245 | return 0; |
a652755d | 2246 | } |
392d5b37 | 2247 | |
d9f644e2 ZJS |
2248 | _public_ int sd_bus_add_match(sd_bus *bus, |
2249 | const char *match, | |
2250 | sd_bus_message_handler_t callback, | |
2251 | void *userdata) { | |
2252 | ||
992c052c LP |
2253 | struct bus_match_component *components = NULL; |
2254 | unsigned n_components = 0; | |
2255 | uint64_t cookie = 0; | |
2256 | int r = 0; | |
392d5b37 | 2257 | |
d6888822 LP |
2258 | assert_return(bus, -EINVAL); |
2259 | assert_return(match, -EINVAL); | |
2260 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
392d5b37 | 2261 | |
992c052c LP |
2262 | r = bus_match_parse(match, &components, &n_components); |
2263 | if (r < 0) | |
2264 | goto finish; | |
29ddb38f | 2265 | |
992c052c LP |
2266 | if (bus->bus_client) { |
2267 | cookie = ++bus->match_cookie; | |
29ddb38f | 2268 | |
992c052c LP |
2269 | r = bus_add_match_internal(bus, match, components, n_components, cookie); |
2270 | if (r < 0) | |
2271 | goto finish; | |
392d5b37 LP |
2272 | } |
2273 | ||
992c052c LP |
2274 | bus->match_callbacks_modified = true; |
2275 | r = bus_match_add(&bus->match_callbacks, components, n_components, callback, userdata, cookie, NULL); | |
29ddb38f | 2276 | if (r < 0) { |
992c052c LP |
2277 | if (bus->bus_client) |
2278 | bus_remove_match_internal(bus, match, cookie); | |
29ddb38f | 2279 | } |
917b5dc7 | 2280 | |
992c052c LP |
2281 | finish: |
2282 | bus_match_parse_free(components, n_components); | |
2283 | return r; | |
917b5dc7 LP |
2284 | } |
2285 | ||
d9f644e2 ZJS |
2286 | _public_ int sd_bus_remove_match(sd_bus *bus, |
2287 | const char *match, | |
2288 | sd_bus_message_handler_t callback, | |
2289 | void *userdata) { | |
2290 | ||
992c052c LP |
2291 | struct bus_match_component *components = NULL; |
2292 | unsigned n_components = 0; | |
2293 | int r = 0, q = 0; | |
2294 | uint64_t cookie = 0; | |
917b5dc7 | 2295 | |
d6888822 LP |
2296 | assert_return(bus, -EINVAL); |
2297 | assert_return(match, -EINVAL); | |
2298 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
917b5dc7 | 2299 | |
992c052c | 2300 | r = bus_match_parse(match, &components, &n_components); |
29ddb38f LP |
2301 | if (r < 0) |
2302 | return r; | |
f10dda3b | 2303 | |
992c052c LP |
2304 | bus->match_callbacks_modified = true; |
2305 | r = bus_match_remove(&bus->match_callbacks, components, n_components, callback, userdata, &cookie); | |
f10dda3b | 2306 | |
992c052c LP |
2307 | if (bus->bus_client) |
2308 | q = bus_remove_match_internal(bus, match, cookie); | |
f10dda3b | 2309 | |
992c052c | 2310 | bus_match_parse_free(components, n_components); |
f10dda3b | 2311 | |
992c052c | 2312 | return r < 0 ? r : q; |
f10dda3b LP |
2313 | } |
2314 | ||
992c052c LP |
2315 | bool bus_pid_changed(sd_bus *bus) { |
2316 | assert(bus); | |
f10dda3b | 2317 | |
992c052c LP |
2318 | /* We don't support people creating a bus connection and |
2319 | * keeping it around over a fork(). Let's complain. */ | |
d5a2b9a6 | 2320 | |
992c052c | 2321 | return bus->original_pid != getpid(); |
d5a2b9a6 | 2322 | } |
40ca29a1 LP |
2323 | |
2324 | static int io_callback(sd_event_source *s, int fd, uint32_t revents, void *userdata) { | |
0927756b | 2325 | sd_bus *bus = userdata; |
40ca29a1 LP |
2326 | int r; |
2327 | ||
2328 | assert(bus); | |
2329 | ||
2330 | r = sd_bus_process(bus, NULL); | |
2331 | if (r < 0) | |
2332 | return r; | |
2333 | ||
2334 | return 1; | |
2335 | } | |
2336 | ||
2337 | static int time_callback(sd_event_source *s, uint64_t usec, void *userdata) { | |
0927756b | 2338 | sd_bus *bus = userdata; |
40ca29a1 LP |
2339 | int r; |
2340 | ||
2341 | assert(bus); | |
2342 | ||
2343 | r = sd_bus_process(bus, NULL); | |
2344 | if (r < 0) | |
2345 | return r; | |
2346 | ||
2347 | return 1; | |
2348 | } | |
2349 | ||
2350 | static int prepare_callback(sd_event_source *s, void *userdata) { | |
2351 | sd_bus *bus = userdata; | |
2352 | int r, e; | |
2353 | usec_t until; | |
2354 | ||
2355 | assert(s); | |
2356 | assert(bus); | |
2357 | ||
2358 | e = sd_bus_get_events(bus); | |
2359 | if (e < 0) | |
2360 | return e; | |
2361 | ||
2362 | if (bus->output_fd != bus->input_fd) { | |
2363 | ||
2364 | r = sd_event_source_set_io_events(bus->input_io_event_source, e & POLLIN); | |
2365 | if (r < 0) | |
2366 | return r; | |
2367 | ||
2368 | r = sd_event_source_set_io_events(bus->output_io_event_source, e & POLLOUT); | |
2369 | if (r < 0) | |
2370 | return r; | |
2371 | } else { | |
2372 | r = sd_event_source_set_io_events(bus->input_io_event_source, e); | |
2373 | if (r < 0) | |
2374 | return r; | |
2375 | } | |
2376 | ||
2377 | r = sd_bus_get_timeout(bus, &until); | |
2378 | if (r < 0) | |
2379 | return r; | |
2380 | if (r > 0) { | |
2381 | int j; | |
2382 | ||
2383 | j = sd_event_source_set_time(bus->time_event_source, until); | |
2384 | if (j < 0) | |
2385 | return j; | |
2386 | } | |
2387 | ||
2388 | r = sd_event_source_set_enabled(bus->time_event_source, r > 0); | |
2389 | if (r < 0) | |
2390 | return r; | |
2391 | ||
2392 | return 1; | |
2393 | } | |
2394 | ||
abc5fe72 LP |
2395 | static int quit_callback(sd_event_source *event, void *userdata) { |
2396 | sd_bus *bus = userdata; | |
2397 | ||
2398 | assert(event); | |
2399 | ||
2400 | sd_bus_flush(bus); | |
2401 | ||
2402 | return 1; | |
2403 | } | |
2404 | ||
d9f644e2 | 2405 | _public_ int sd_bus_attach_event(sd_bus *bus, sd_event *event, int priority) { |
40ca29a1 LP |
2406 | int r; |
2407 | ||
2408 | assert_return(bus, -EINVAL); | |
40ca29a1 LP |
2409 | assert_return(!bus->event, -EBUSY); |
2410 | ||
2411 | assert(!bus->input_io_event_source); | |
2412 | assert(!bus->output_io_event_source); | |
2413 | assert(!bus->time_event_source); | |
2414 | ||
76b54375 LP |
2415 | if (event) |
2416 | bus->event = sd_event_ref(event); | |
2417 | else { | |
2418 | r = sd_event_default(&bus->event); | |
2419 | if (r < 0) | |
2420 | return r; | |
2421 | } | |
40ca29a1 | 2422 | |
76b54375 | 2423 | r = sd_event_add_io(bus->event, bus->input_fd, 0, io_callback, bus, &bus->input_io_event_source); |
40ca29a1 LP |
2424 | if (r < 0) |
2425 | goto fail; | |
2426 | ||
2427 | r = sd_event_source_set_priority(bus->input_io_event_source, priority); | |
2428 | if (r < 0) | |
2429 | goto fail; | |
2430 | ||
2431 | if (bus->output_fd != bus->input_fd) { | |
76b54375 | 2432 | r = sd_event_add_io(bus->event, bus->output_fd, 0, io_callback, bus, &bus->output_io_event_source); |
40ca29a1 LP |
2433 | if (r < 0) |
2434 | goto fail; | |
2435 | ||
2436 | r = sd_event_source_set_priority(bus->output_io_event_source, priority); | |
2437 | if (r < 0) | |
2438 | goto fail; | |
2439 | } | |
2440 | ||
2441 | r = sd_event_source_set_prepare(bus->input_io_event_source, prepare_callback); | |
2442 | if (r < 0) | |
2443 | goto fail; | |
2444 | ||
76b54375 | 2445 | r = sd_event_add_monotonic(bus->event, 0, 0, time_callback, bus, &bus->time_event_source); |
40ca29a1 LP |
2446 | if (r < 0) |
2447 | goto fail; | |
2448 | ||
2449 | r = sd_event_source_set_priority(bus->time_event_source, priority); | |
2450 | if (r < 0) | |
2451 | goto fail; | |
2452 | ||
76b54375 | 2453 | r = sd_event_add_quit(bus->event, quit_callback, bus, &bus->quit_event_source); |
abc5fe72 LP |
2454 | if (r < 0) |
2455 | goto fail; | |
2456 | ||
40ca29a1 LP |
2457 | return 0; |
2458 | ||
2459 | fail: | |
2460 | sd_bus_detach_event(bus); | |
2461 | return r; | |
2462 | } | |
2463 | ||
d9f644e2 | 2464 | _public_ int sd_bus_detach_event(sd_bus *bus) { |
40ca29a1 LP |
2465 | assert_return(bus, -EINVAL); |
2466 | assert_return(bus->event, -ENXIO); | |
2467 | ||
2468 | if (bus->input_io_event_source) | |
2469 | bus->input_io_event_source = sd_event_source_unref(bus->input_io_event_source); | |
2470 | ||
2471 | if (bus->output_io_event_source) | |
2472 | bus->output_io_event_source = sd_event_source_unref(bus->output_io_event_source); | |
2473 | ||
2474 | if (bus->time_event_source) | |
2475 | bus->time_event_source = sd_event_source_unref(bus->time_event_source); | |
2476 | ||
abc5fe72 LP |
2477 | if (bus->quit_event_source) |
2478 | bus->quit_event_source = sd_event_source_unref(bus->quit_event_source); | |
2479 | ||
40ca29a1 LP |
2480 | if (bus->event) |
2481 | bus->event = sd_event_unref(bus->event); | |
2482 | ||
2483 | return 0; | |
2484 | } | |
affff0b6 | 2485 | |
76b54375 | 2486 | _public_ sd_bus_message* sd_bus_get_current(sd_bus *bus) { |
affff0b6 LP |
2487 | assert_return(bus, NULL); |
2488 | ||
2489 | return bus->current; | |
2490 | } | |
76b54375 LP |
2491 | |
2492 | static int bus_default(int (*bus_open)(sd_bus **), sd_bus **default_bus, sd_bus **ret) { | |
2493 | sd_bus *b = NULL; | |
2494 | int r; | |
2495 | ||
2496 | assert(bus_open); | |
2497 | assert(default_bus); | |
2498 | ||
2499 | if (!ret) | |
2500 | return !!*default_bus; | |
2501 | ||
2502 | if (*default_bus) { | |
2503 | *ret = sd_bus_ref(*default_bus); | |
2504 | return 0; | |
2505 | } | |
2506 | ||
2507 | r = bus_open(&b); | |
2508 | if (r < 0) | |
2509 | return r; | |
2510 | ||
2511 | b->default_bus_ptr = default_bus; | |
2512 | b->tid = gettid(); | |
2513 | *default_bus = b; | |
2514 | ||
2515 | *ret = b; | |
2516 | return 1; | |
2517 | } | |
2518 | ||
2519 | _public_ int sd_bus_default_system(sd_bus **ret) { | |
2520 | static __thread sd_bus *default_system_bus = NULL; | |
2521 | ||
2522 | return bus_default(sd_bus_open_system, &default_system_bus, ret); | |
2523 | } | |
2524 | ||
2525 | _public_ int sd_bus_default_user(sd_bus **ret) { | |
2526 | static __thread sd_bus *default_user_bus = NULL; | |
2527 | ||
2528 | return bus_default(sd_bus_open_user, &default_user_bus, ret); | |
2529 | } | |
2530 | ||
2531 | _public_ int sd_bus_get_tid(sd_bus *b, pid_t *tid) { | |
2532 | assert_return(b, -EINVAL); | |
2533 | assert_return(tid, -EINVAL); | |
2534 | assert_return(!bus_pid_changed(b), -ECHILD); | |
2535 | ||
2536 | if (b->tid != 0) { | |
2537 | *tid = b->tid; | |
2538 | return 0; | |
2539 | } | |
2540 | ||
2541 | if (b->event) | |
2542 | return sd_event_get_tid(b->event, tid); | |
2543 | ||
2544 | return -ENXIO; | |
2545 | } |