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[thirdparty/systemd.git] / src / shared / bus-util.c
1 /* SPDX-License-Identifier: LGPL-2.1+ */
2
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <inttypes.h>
6 #include <stdio.h>
7 #include <stdlib.h>
8 #include <string.h>
9 #include <sys/ioctl.h>
10 #include <sys/resource.h>
11 #include <sys/socket.h>
12 #include <unistd.h>
13
14 #include "sd-bus-protocol.h"
15 #include "sd-bus.h"
16 #include "sd-daemon.h"
17 #include "sd-event.h"
18 #include "sd-id128.h"
19
20 #include "alloc-util.h"
21 #include "bus-internal.h"
22 #include "bus-label.h"
23 #include "bus-message.h"
24 #include "bus-util.h"
25 #include "cap-list.h"
26 #include "cgroup-util.h"
27 #include "def.h"
28 #include "escape.h"
29 #include "fd-util.h"
30 #include "missing.h"
31 #include "mountpoint-util.h"
32 #include "nsflags.h"
33 #include "parse-util.h"
34 #include "proc-cmdline.h"
35 #include "rlimit-util.h"
36 #include "stdio-util.h"
37 #include "strv.h"
38 #include "user-util.h"
39
40 static int name_owner_change_callback(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
41 sd_event *e = userdata;
42
43 assert(m);
44 assert(e);
45
46 sd_bus_close(sd_bus_message_get_bus(m));
47 sd_event_exit(e, 0);
48
49 return 1;
50 }
51
52 int bus_async_unregister_and_exit(sd_event *e, sd_bus *bus, const char *name) {
53 const char *match;
54 const char *unique;
55 int r;
56
57 assert(e);
58 assert(bus);
59 assert(name);
60
61 /* We unregister the name here and then wait for the
62 * NameOwnerChanged signal for this event to arrive before we
63 * quit. We do this in order to make sure that any queued
64 * requests are still processed before we really exit. */
65
66 r = sd_bus_get_unique_name(bus, &unique);
67 if (r < 0)
68 return r;
69
70 match = strjoina(
71 "sender='org.freedesktop.DBus',"
72 "type='signal',"
73 "interface='org.freedesktop.DBus',"
74 "member='NameOwnerChanged',"
75 "path='/org/freedesktop/DBus',"
76 "arg0='", name, "',",
77 "arg1='", unique, "',",
78 "arg2=''");
79
80 r = sd_bus_add_match_async(bus, NULL, match, name_owner_change_callback, NULL, e);
81 if (r < 0)
82 return r;
83
84 r = sd_bus_release_name_async(bus, NULL, name, NULL, NULL);
85 if (r < 0)
86 return r;
87
88 return 0;
89 }
90
91 int bus_event_loop_with_idle(
92 sd_event *e,
93 sd_bus *bus,
94 const char *name,
95 usec_t timeout,
96 check_idle_t check_idle,
97 void *userdata) {
98 bool exiting = false;
99 int r, code;
100
101 assert(e);
102 assert(bus);
103 assert(name);
104
105 for (;;) {
106 bool idle;
107
108 r = sd_event_get_state(e);
109 if (r < 0)
110 return r;
111 if (r == SD_EVENT_FINISHED)
112 break;
113
114 if (check_idle)
115 idle = check_idle(userdata);
116 else
117 idle = true;
118
119 r = sd_event_run(e, exiting || !idle ? (uint64_t) -1 : timeout);
120 if (r < 0)
121 return r;
122
123 if (r == 0 && !exiting && idle) {
124
125 r = sd_bus_try_close(bus);
126 if (r == -EBUSY)
127 continue;
128
129 /* Fallback for dbus1 connections: we
130 * unregister the name and wait for the
131 * response to come through for it */
132 if (r == -EOPNOTSUPP) {
133
134 /* Inform the service manager that we
135 * are going down, so that it will
136 * queue all further start requests,
137 * instead of assuming we are already
138 * running. */
139 sd_notify(false, "STOPPING=1");
140
141 r = bus_async_unregister_and_exit(e, bus, name);
142 if (r < 0)
143 return r;
144
145 exiting = true;
146 continue;
147 }
148
149 if (r < 0)
150 return r;
151
152 sd_event_exit(e, 0);
153 break;
154 }
155 }
156
157 r = sd_event_get_exit_code(e, &code);
158 if (r < 0)
159 return r;
160
161 return code;
162 }
163
164 int bus_name_has_owner(sd_bus *c, const char *name, sd_bus_error *error) {
165 _cleanup_(sd_bus_message_unrefp) sd_bus_message *rep = NULL;
166 int r, has_owner = 0;
167
168 assert(c);
169 assert(name);
170
171 r = sd_bus_call_method(c,
172 "org.freedesktop.DBus",
173 "/org/freedesktop/dbus",
174 "org.freedesktop.DBus",
175 "NameHasOwner",
176 error,
177 &rep,
178 "s",
179 name);
180 if (r < 0)
181 return r;
182
183 r = sd_bus_message_read_basic(rep, 'b', &has_owner);
184 if (r < 0)
185 return sd_bus_error_set_errno(error, r);
186
187 return has_owner;
188 }
189
190 static int check_good_user(sd_bus_message *m, uid_t good_user) {
191 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
192 uid_t sender_uid;
193 int r;
194
195 assert(m);
196
197 if (good_user == UID_INVALID)
198 return 0;
199
200 r = sd_bus_query_sender_creds(m, SD_BUS_CREDS_EUID, &creds);
201 if (r < 0)
202 return r;
203
204 /* Don't trust augmented credentials for authorization */
205 assert_return((sd_bus_creds_get_augmented_mask(creds) & SD_BUS_CREDS_EUID) == 0, -EPERM);
206
207 r = sd_bus_creds_get_euid(creds, &sender_uid);
208 if (r < 0)
209 return r;
210
211 return sender_uid == good_user;
212 }
213
214 int bus_test_polkit(
215 sd_bus_message *call,
216 int capability,
217 const char *action,
218 const char **details,
219 uid_t good_user,
220 bool *_challenge,
221 sd_bus_error *e) {
222
223 int r;
224
225 assert(call);
226 assert(action);
227
228 /* Tests non-interactively! */
229
230 r = check_good_user(call, good_user);
231 if (r != 0)
232 return r;
233
234 r = sd_bus_query_sender_privilege(call, capability);
235 if (r < 0)
236 return r;
237 else if (r > 0)
238 return 1;
239 #if ENABLE_POLKIT
240 else {
241 _cleanup_(sd_bus_message_unrefp) sd_bus_message *request = NULL;
242 _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
243 int authorized = false, challenge = false;
244 const char *sender, **k, **v;
245
246 sender = sd_bus_message_get_sender(call);
247 if (!sender)
248 return -EBADMSG;
249
250 r = sd_bus_message_new_method_call(
251 call->bus,
252 &request,
253 "org.freedesktop.PolicyKit1",
254 "/org/freedesktop/PolicyKit1/Authority",
255 "org.freedesktop.PolicyKit1.Authority",
256 "CheckAuthorization");
257 if (r < 0)
258 return r;
259
260 r = sd_bus_message_append(
261 request,
262 "(sa{sv})s",
263 "system-bus-name", 1, "name", "s", sender,
264 action);
265 if (r < 0)
266 return r;
267
268 r = sd_bus_message_open_container(request, 'a', "{ss}");
269 if (r < 0)
270 return r;
271
272 STRV_FOREACH_PAIR(k, v, details) {
273 r = sd_bus_message_append(request, "{ss}", *k, *v);
274 if (r < 0)
275 return r;
276 }
277
278 r = sd_bus_message_close_container(request);
279 if (r < 0)
280 return r;
281
282 r = sd_bus_message_append(request, "us", 0, NULL);
283 if (r < 0)
284 return r;
285
286 r = sd_bus_call(call->bus, request, 0, e, &reply);
287 if (r < 0) {
288 /* Treat no PK available as access denied */
289 if (sd_bus_error_has_name(e, SD_BUS_ERROR_SERVICE_UNKNOWN)) {
290 sd_bus_error_free(e);
291 return -EACCES;
292 }
293
294 return r;
295 }
296
297 r = sd_bus_message_enter_container(reply, 'r', "bba{ss}");
298 if (r < 0)
299 return r;
300
301 r = sd_bus_message_read(reply, "bb", &authorized, &challenge);
302 if (r < 0)
303 return r;
304
305 if (authorized)
306 return 1;
307
308 if (_challenge) {
309 *_challenge = challenge;
310 return 0;
311 }
312 }
313 #endif
314
315 return -EACCES;
316 }
317
318 #if ENABLE_POLKIT
319
320 typedef struct AsyncPolkitQuery {
321 sd_bus_message *request, *reply;
322 sd_bus_message_handler_t callback;
323 void *userdata;
324 sd_bus_slot *slot;
325 Hashmap *registry;
326 } AsyncPolkitQuery;
327
328 static void async_polkit_query_free(AsyncPolkitQuery *q) {
329
330 if (!q)
331 return;
332
333 sd_bus_slot_unref(q->slot);
334
335 if (q->registry && q->request)
336 hashmap_remove(q->registry, q->request);
337
338 sd_bus_message_unref(q->request);
339 sd_bus_message_unref(q->reply);
340
341 free(q);
342 }
343
344 static int async_polkit_callback(sd_bus_message *reply, void *userdata, sd_bus_error *error) {
345 _cleanup_(sd_bus_error_free) sd_bus_error error_buffer = SD_BUS_ERROR_NULL;
346 AsyncPolkitQuery *q = userdata;
347 int r;
348
349 assert(reply);
350 assert(q);
351
352 q->slot = sd_bus_slot_unref(q->slot);
353 q->reply = sd_bus_message_ref(reply);
354
355 r = sd_bus_message_rewind(q->request, true);
356 if (r < 0) {
357 r = sd_bus_reply_method_errno(q->request, r, NULL);
358 goto finish;
359 }
360
361 r = q->callback(q->request, q->userdata, &error_buffer);
362 r = bus_maybe_reply_error(q->request, r, &error_buffer);
363
364 finish:
365 async_polkit_query_free(q);
366
367 return r;
368 }
369
370 #endif
371
372 int bus_verify_polkit_async(
373 sd_bus_message *call,
374 int capability,
375 const char *action,
376 const char **details,
377 bool interactive,
378 uid_t good_user,
379 Hashmap **registry,
380 sd_bus_error *error) {
381
382 #if ENABLE_POLKIT
383 _cleanup_(sd_bus_message_unrefp) sd_bus_message *pk = NULL;
384 AsyncPolkitQuery *q;
385 const char *sender, **k, **v;
386 sd_bus_message_handler_t callback;
387 void *userdata;
388 int c;
389 #endif
390 int r;
391
392 assert(call);
393 assert(action);
394 assert(registry);
395
396 r = check_good_user(call, good_user);
397 if (r != 0)
398 return r;
399
400 #if ENABLE_POLKIT
401 q = hashmap_get(*registry, call);
402 if (q) {
403 int authorized, challenge;
404
405 /* This is the second invocation of this function, and
406 * there's already a response from polkit, let's
407 * process it */
408 assert(q->reply);
409
410 if (sd_bus_message_is_method_error(q->reply, NULL)) {
411 const sd_bus_error *e;
412
413 /* Copy error from polkit reply */
414 e = sd_bus_message_get_error(q->reply);
415 sd_bus_error_copy(error, e);
416
417 /* Treat no PK available as access denied */
418 if (sd_bus_error_has_name(e, SD_BUS_ERROR_SERVICE_UNKNOWN))
419 return -EACCES;
420
421 return -sd_bus_error_get_errno(e);
422 }
423
424 r = sd_bus_message_enter_container(q->reply, 'r', "bba{ss}");
425 if (r >= 0)
426 r = sd_bus_message_read(q->reply, "bb", &authorized, &challenge);
427
428 if (r < 0)
429 return r;
430
431 if (authorized)
432 return 1;
433
434 if (challenge)
435 return sd_bus_error_set(error, SD_BUS_ERROR_INTERACTIVE_AUTHORIZATION_REQUIRED, "Interactive authentication required.");
436
437 return -EACCES;
438 }
439 #endif
440
441 r = sd_bus_query_sender_privilege(call, capability);
442 if (r < 0)
443 return r;
444 else if (r > 0)
445 return 1;
446
447 #if ENABLE_POLKIT
448 if (sd_bus_get_current_message(call->bus) != call)
449 return -EINVAL;
450
451 callback = sd_bus_get_current_handler(call->bus);
452 if (!callback)
453 return -EINVAL;
454
455 userdata = sd_bus_get_current_userdata(call->bus);
456
457 sender = sd_bus_message_get_sender(call);
458 if (!sender)
459 return -EBADMSG;
460
461 c = sd_bus_message_get_allow_interactive_authorization(call);
462 if (c < 0)
463 return c;
464 if (c > 0)
465 interactive = true;
466
467 r = hashmap_ensure_allocated(registry, NULL);
468 if (r < 0)
469 return r;
470
471 r = sd_bus_message_new_method_call(
472 call->bus,
473 &pk,
474 "org.freedesktop.PolicyKit1",
475 "/org/freedesktop/PolicyKit1/Authority",
476 "org.freedesktop.PolicyKit1.Authority",
477 "CheckAuthorization");
478 if (r < 0)
479 return r;
480
481 r = sd_bus_message_append(
482 pk,
483 "(sa{sv})s",
484 "system-bus-name", 1, "name", "s", sender,
485 action);
486 if (r < 0)
487 return r;
488
489 r = sd_bus_message_open_container(pk, 'a', "{ss}");
490 if (r < 0)
491 return r;
492
493 STRV_FOREACH_PAIR(k, v, details) {
494 r = sd_bus_message_append(pk, "{ss}", *k, *v);
495 if (r < 0)
496 return r;
497 }
498
499 r = sd_bus_message_close_container(pk);
500 if (r < 0)
501 return r;
502
503 r = sd_bus_message_append(pk, "us", interactive, NULL);
504 if (r < 0)
505 return r;
506
507 q = new0(AsyncPolkitQuery, 1);
508 if (!q)
509 return -ENOMEM;
510
511 q->request = sd_bus_message_ref(call);
512 q->callback = callback;
513 q->userdata = userdata;
514
515 r = hashmap_put(*registry, call, q);
516 if (r < 0) {
517 async_polkit_query_free(q);
518 return r;
519 }
520
521 q->registry = *registry;
522
523 r = sd_bus_call_async(call->bus, &q->slot, pk, async_polkit_callback, q, 0);
524 if (r < 0) {
525 async_polkit_query_free(q);
526 return r;
527 }
528
529 return 0;
530 #endif
531
532 return -EACCES;
533 }
534
535 void bus_verify_polkit_async_registry_free(Hashmap *registry) {
536 #if ENABLE_POLKIT
537 hashmap_free_with_destructor(registry, async_polkit_query_free);
538 #endif
539 }
540
541 int bus_check_peercred(sd_bus *c) {
542 struct ucred ucred;
543 int fd, r;
544
545 assert(c);
546
547 fd = sd_bus_get_fd(c);
548 if (fd < 0)
549 return fd;
550
551 r = getpeercred(fd, &ucred);
552 if (r < 0)
553 return r;
554
555 if (ucred.uid != 0 && ucred.uid != geteuid())
556 return -EPERM;
557
558 return 1;
559 }
560
561 int bus_connect_system_systemd(sd_bus **_bus) {
562 _cleanup_(sd_bus_unrefp) sd_bus *bus = NULL;
563 int r;
564
565 assert(_bus);
566
567 if (geteuid() != 0)
568 return sd_bus_default_system(_bus);
569
570 /* If we are root then let's talk directly to the system
571 * instance, instead of going via the bus */
572
573 r = sd_bus_new(&bus);
574 if (r < 0)
575 return r;
576
577 r = sd_bus_set_address(bus, "unix:path=/run/systemd/private");
578 if (r < 0)
579 return r;
580
581 r = sd_bus_start(bus);
582 if (r < 0)
583 return sd_bus_default_system(_bus);
584
585 r = bus_check_peercred(bus);
586 if (r < 0)
587 return r;
588
589 *_bus = TAKE_PTR(bus);
590
591 return 0;
592 }
593
594 int bus_connect_user_systemd(sd_bus **_bus) {
595 _cleanup_(sd_bus_unrefp) sd_bus *bus = NULL;
596 _cleanup_free_ char *ee = NULL;
597 const char *e;
598 int r;
599
600 assert(_bus);
601
602 e = secure_getenv("XDG_RUNTIME_DIR");
603 if (!e)
604 return sd_bus_default_user(_bus);
605
606 ee = bus_address_escape(e);
607 if (!ee)
608 return -ENOMEM;
609
610 r = sd_bus_new(&bus);
611 if (r < 0)
612 return r;
613
614 bus->address = strjoin("unix:path=", ee, "/systemd/private");
615 if (!bus->address)
616 return -ENOMEM;
617
618 r = sd_bus_start(bus);
619 if (r < 0)
620 return sd_bus_default_user(_bus);
621
622 r = bus_check_peercred(bus);
623 if (r < 0)
624 return r;
625
626 *_bus = TAKE_PTR(bus);
627
628 return 0;
629 }
630
631 int bus_print_property_value(const char *name, const char *expected_value, bool only_value, const char *fmt, ...) {
632 va_list ap;
633 int r;
634
635 assert(name);
636 assert(fmt);
637
638 if (expected_value) {
639 _cleanup_free_ char *s = NULL;
640
641 va_start(ap, fmt);
642 r = vasprintf(&s, fmt, ap);
643 va_end(ap);
644 if (r < 0)
645 return -ENOMEM;
646
647 if (streq_ptr(expected_value, s)) {
648 if (only_value)
649 puts(s);
650 else
651 printf("%s=%s\n", name, s);
652 }
653
654 return 0;
655 }
656
657 if (!only_value)
658 printf("%s=", name);
659 va_start(ap, fmt);
660 vprintf(fmt, ap);
661 va_end(ap);
662 puts("");
663
664 return 0;
665 }
666
667 static int bus_print_property(const char *name, const char *expected_value, sd_bus_message *m, bool value, bool all) {
668 char type;
669 const char *contents;
670 int r;
671
672 assert(name);
673 assert(m);
674
675 r = sd_bus_message_peek_type(m, &type, &contents);
676 if (r < 0)
677 return r;
678
679 switch (type) {
680
681 case SD_BUS_TYPE_STRING: {
682 const char *s;
683
684 r = sd_bus_message_read_basic(m, type, &s);
685 if (r < 0)
686 return r;
687
688 if (all || !isempty(s)) {
689 bool good;
690
691 /* This property has a single value, so we need to take
692 * care not to print a new line, everything else is OK. */
693 good = !strchr(s, '\n');
694 bus_print_property_value(name, expected_value, value, "%s", good ? s : "[unprintable]");
695 }
696
697 return 1;
698 }
699
700 case SD_BUS_TYPE_BOOLEAN: {
701 int b;
702
703 r = sd_bus_message_read_basic(m, type, &b);
704 if (r < 0)
705 return r;
706
707 if (expected_value && parse_boolean(expected_value) != b)
708 return 1;
709
710 bus_print_property_value(name, NULL, value, "%s", yes_no(b));
711 return 1;
712 }
713
714 case SD_BUS_TYPE_UINT64: {
715 uint64_t u;
716
717 r = sd_bus_message_read_basic(m, type, &u);
718 if (r < 0)
719 return r;
720
721 /* Yes, heuristics! But we can change this check
722 * should it turn out to not be sufficient */
723
724 if (endswith(name, "Timestamp") ||
725 STR_IN_SET(name, "NextElapseUSecRealtime", "LastTriggerUSec", "TimeUSec", "RTCTimeUSec")) {
726 char timestamp[FORMAT_TIMESTAMP_MAX];
727 const char *t;
728
729 t = format_timestamp(timestamp, sizeof(timestamp), u);
730 if (t || all)
731 bus_print_property_value(name, expected_value, value, "%s", strempty(t));
732
733 } else if (strstr(name, "USec")) {
734 char timespan[FORMAT_TIMESPAN_MAX];
735
736 (void) format_timespan(timespan, sizeof(timespan), u, 0);
737 bus_print_property_value(name, expected_value, value, "%s", timespan);
738
739 } else if (streq(name, "RestrictNamespaces")) {
740 _cleanup_free_ char *s = NULL;
741 const char *result;
742
743 if ((u & NAMESPACE_FLAGS_ALL) == 0)
744 result = "yes";
745 else if ((u & NAMESPACE_FLAGS_ALL) == NAMESPACE_FLAGS_ALL)
746 result = "no";
747 else {
748 r = namespace_flags_to_string(u, &s);
749 if (r < 0)
750 return r;
751
752 result = s;
753 }
754
755 bus_print_property_value(name, expected_value, value, "%s", result);
756
757 } else if (streq(name, "MountFlags")) {
758 const char *result;
759
760 result = mount_propagation_flags_to_string(u);
761 if (!result)
762 return -EINVAL;
763
764 bus_print_property_value(name, expected_value, value, "%s", result);
765
766 } else if (STR_IN_SET(name, "CapabilityBoundingSet", "AmbientCapabilities")) {
767 _cleanup_free_ char *s = NULL;
768
769 r = capability_set_to_string_alloc(u, &s);
770 if (r < 0)
771 return r;
772
773 bus_print_property_value(name, expected_value, value, "%s", s);
774
775 } else if ((STR_IN_SET(name, "CPUWeight", "StartupCPUWeight", "IOWeight", "StartupIOWeight") && u == CGROUP_WEIGHT_INVALID) ||
776 (STR_IN_SET(name, "CPUShares", "StartupCPUShares") && u == CGROUP_CPU_SHARES_INVALID) ||
777 (STR_IN_SET(name, "BlockIOWeight", "StartupBlockIOWeight") && u == CGROUP_BLKIO_WEIGHT_INVALID) ||
778 (STR_IN_SET(name, "MemoryCurrent", "TasksCurrent") && u == (uint64_t) -1) ||
779 (endswith(name, "NSec") && u == (uint64_t) -1))
780
781 bus_print_property_value(name, expected_value, value, "%s", "[not set]");
782
783 else if ((STR_IN_SET(name, "MemoryLow", "MemoryHigh", "MemoryMax", "MemorySwapMax", "MemoryLimit") && u == CGROUP_LIMIT_MAX) ||
784 (STR_IN_SET(name, "TasksMax", "DefaultTasksMax") && u == (uint64_t) -1) ||
785 (startswith(name, "Limit") && u == (uint64_t) -1) ||
786 (startswith(name, "DefaultLimit") && u == (uint64_t) -1))
787
788 bus_print_property_value(name, expected_value, value, "%s", "infinity");
789 else
790 bus_print_property_value(name, expected_value, value, "%"PRIu64, u);
791
792 return 1;
793 }
794
795 case SD_BUS_TYPE_INT64: {
796 int64_t i;
797
798 r = sd_bus_message_read_basic(m, type, &i);
799 if (r < 0)
800 return r;
801
802 bus_print_property_value(name, expected_value, value, "%"PRIi64, i);
803 return 1;
804 }
805
806 case SD_BUS_TYPE_UINT32: {
807 uint32_t u;
808
809 r = sd_bus_message_read_basic(m, type, &u);
810 if (r < 0)
811 return r;
812
813 if (strstr(name, "UMask") || strstr(name, "Mode"))
814 bus_print_property_value(name, expected_value, value, "%04o", u);
815
816 else if (streq(name, "UID")) {
817 if (u == UID_INVALID)
818 bus_print_property_value(name, expected_value, value, "%s", "[not set]");
819 else
820 bus_print_property_value(name, expected_value, value, "%"PRIu32, u);
821 } else if (streq(name, "GID")) {
822 if (u == GID_INVALID)
823 bus_print_property_value(name, expected_value, value, "%s", "[not set]");
824 else
825 bus_print_property_value(name, expected_value, value, "%"PRIu32, u);
826 } else
827 bus_print_property_value(name, expected_value, value, "%"PRIu32, u);
828
829 return 1;
830 }
831
832 case SD_BUS_TYPE_INT32: {
833 int32_t i;
834
835 r = sd_bus_message_read_basic(m, type, &i);
836 if (r < 0)
837 return r;
838
839 bus_print_property_value(name, expected_value, value, "%"PRIi32, i);
840 return 1;
841 }
842
843 case SD_BUS_TYPE_DOUBLE: {
844 double d;
845
846 r = sd_bus_message_read_basic(m, type, &d);
847 if (r < 0)
848 return r;
849
850 bus_print_property_value(name, expected_value, value, "%g", d);
851 return 1;
852 }
853
854 case SD_BUS_TYPE_ARRAY:
855 if (streq(contents, "s")) {
856 bool first = true;
857 const char *str;
858
859 r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, contents);
860 if (r < 0)
861 return r;
862
863 while ((r = sd_bus_message_read_basic(m, SD_BUS_TYPE_STRING, &str)) > 0) {
864 bool good;
865
866 if (first && !value)
867 printf("%s=", name);
868
869 /* This property has multiple space-separated values, so
870 * neither spaces nor newlines can be allowed in a value. */
871 good = str[strcspn(str, " \n")] == '\0';
872
873 printf("%s%s", first ? "" : " ", good ? str : "[unprintable]");
874
875 first = false;
876 }
877 if (r < 0)
878 return r;
879
880 if (first && all && !value)
881 printf("%s=", name);
882 if (!first || all)
883 puts("");
884
885 r = sd_bus_message_exit_container(m);
886 if (r < 0)
887 return r;
888
889 return 1;
890
891 } else if (streq(contents, "y")) {
892 const uint8_t *u;
893 size_t n;
894
895 r = sd_bus_message_read_array(m, SD_BUS_TYPE_BYTE, (const void**) &u, &n);
896 if (r < 0)
897 return r;
898
899 if (all || n > 0) {
900 unsigned i;
901
902 if (!value)
903 printf("%s=", name);
904
905 for (i = 0; i < n; i++)
906 printf("%02x", u[i]);
907
908 puts("");
909 }
910
911 return 1;
912
913 } else if (streq(contents, "u")) {
914 uint32_t *u;
915 size_t n;
916
917 r = sd_bus_message_read_array(m, SD_BUS_TYPE_UINT32, (const void**) &u, &n);
918 if (r < 0)
919 return r;
920
921 if (all || n > 0) {
922 unsigned i;
923
924 if (!value)
925 printf("%s=", name);
926
927 for (i = 0; i < n; i++)
928 printf("%08x", u[i]);
929
930 puts("");
931 }
932
933 return 1;
934 }
935
936 break;
937 }
938
939 return 0;
940 }
941
942 int bus_message_print_all_properties(
943 sd_bus_message *m,
944 bus_message_print_t func,
945 char **filter,
946 bool value,
947 bool all,
948 Set **found_properties) {
949
950 int r;
951
952 assert(m);
953
954 r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, "{sv}");
955 if (r < 0)
956 return r;
957
958 while ((r = sd_bus_message_enter_container(m, SD_BUS_TYPE_DICT_ENTRY, "sv")) > 0) {
959 _cleanup_free_ char *name_with_equal = NULL;
960 const char *name, *contents, *expected_value = NULL;
961
962 r = sd_bus_message_read_basic(m, SD_BUS_TYPE_STRING, &name);
963 if (r < 0)
964 return r;
965
966 if (found_properties) {
967 r = set_ensure_allocated(found_properties, &string_hash_ops);
968 if (r < 0)
969 return log_oom();
970
971 r = set_put(*found_properties, name);
972 if (r < 0 && r != -EEXIST)
973 return log_oom();
974 }
975
976 name_with_equal = strappend(name, "=");
977 if (!name_with_equal)
978 return log_oom();
979
980 if (!filter || strv_find(filter, name) ||
981 (expected_value = strv_find_startswith(filter, name_with_equal))) {
982 r = sd_bus_message_peek_type(m, NULL, &contents);
983 if (r < 0)
984 return r;
985
986 r = sd_bus_message_enter_container(m, SD_BUS_TYPE_VARIANT, contents);
987 if (r < 0)
988 return r;
989
990 if (func)
991 r = func(name, expected_value, m, value, all);
992 if (!func || r == 0)
993 r = bus_print_property(name, expected_value, m, value, all);
994 if (r < 0)
995 return r;
996 if (r == 0) {
997 if (all && !expected_value)
998 printf("%s=[unprintable]\n", name);
999 /* skip what we didn't read */
1000 r = sd_bus_message_skip(m, contents);
1001 if (r < 0)
1002 return r;
1003 }
1004
1005 r = sd_bus_message_exit_container(m);
1006 if (r < 0)
1007 return r;
1008 } else {
1009 r = sd_bus_message_skip(m, "v");
1010 if (r < 0)
1011 return r;
1012 }
1013
1014 r = sd_bus_message_exit_container(m);
1015 if (r < 0)
1016 return r;
1017 }
1018 if (r < 0)
1019 return r;
1020
1021 r = sd_bus_message_exit_container(m);
1022 if (r < 0)
1023 return r;
1024
1025 return 0;
1026 }
1027
1028 int bus_print_all_properties(
1029 sd_bus *bus,
1030 const char *dest,
1031 const char *path,
1032 bus_message_print_t func,
1033 char **filter,
1034 bool value,
1035 bool all,
1036 Set **found_properties) {
1037
1038 _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
1039 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1040 int r;
1041
1042 assert(bus);
1043 assert(path);
1044
1045 r = sd_bus_call_method(bus,
1046 dest,
1047 path,
1048 "org.freedesktop.DBus.Properties",
1049 "GetAll",
1050 &error,
1051 &reply,
1052 "s", "");
1053 if (r < 0)
1054 return r;
1055
1056 return bus_message_print_all_properties(reply, func, filter, value, all, found_properties);
1057 }
1058
1059 int bus_map_id128(sd_bus *bus, const char *member, sd_bus_message *m, sd_bus_error *error, void *userdata) {
1060 sd_id128_t *p = userdata;
1061 const void *v;
1062 size_t n;
1063 int r;
1064
1065 r = sd_bus_message_read_array(m, SD_BUS_TYPE_BYTE, &v, &n);
1066 if (r < 0)
1067 return r;
1068
1069 if (n == 0)
1070 *p = SD_ID128_NULL;
1071 else if (n == 16)
1072 memcpy((*p).bytes, v, n);
1073 else
1074 return -EINVAL;
1075
1076 return 0;
1077 }
1078
1079 static int map_basic(sd_bus *bus, const char *member, sd_bus_message *m, unsigned flags, sd_bus_error *error, void *userdata) {
1080 char type;
1081 int r;
1082
1083 r = sd_bus_message_peek_type(m, &type, NULL);
1084 if (r < 0)
1085 return r;
1086
1087 switch (type) {
1088
1089 case SD_BUS_TYPE_STRING: {
1090 const char **p = userdata;
1091 const char *s;
1092
1093 r = sd_bus_message_read_basic(m, type, &s);
1094 if (r < 0)
1095 return r;
1096
1097 if (isempty(s))
1098 s = NULL;
1099
1100 if (flags & BUS_MAP_STRDUP)
1101 return free_and_strdup((char **) userdata, s);
1102
1103 *p = s;
1104 return 0;
1105 }
1106
1107 case SD_BUS_TYPE_ARRAY: {
1108 _cleanup_strv_free_ char **l = NULL;
1109 char ***p = userdata;
1110
1111 r = bus_message_read_strv_extend(m, &l);
1112 if (r < 0)
1113 return r;
1114
1115 return strv_free_and_replace(*p, l);
1116 }
1117
1118 case SD_BUS_TYPE_BOOLEAN: {
1119 int b;
1120
1121 r = sd_bus_message_read_basic(m, type, &b);
1122 if (r < 0)
1123 return r;
1124
1125 if (flags & BUS_MAP_BOOLEAN_AS_BOOL)
1126 *(bool*) userdata = b;
1127 else
1128 *(int*) userdata = b;
1129
1130 return 0;
1131 }
1132
1133 case SD_BUS_TYPE_INT32:
1134 case SD_BUS_TYPE_UINT32: {
1135 uint32_t u, *p = userdata;
1136
1137 r = sd_bus_message_read_basic(m, type, &u);
1138 if (r < 0)
1139 return r;
1140
1141 *p = u;
1142 return 0;
1143 }
1144
1145 case SD_BUS_TYPE_INT64:
1146 case SD_BUS_TYPE_UINT64: {
1147 uint64_t t, *p = userdata;
1148
1149 r = sd_bus_message_read_basic(m, type, &t);
1150 if (r < 0)
1151 return r;
1152
1153 *p = t;
1154 return 0;
1155 }
1156
1157 case SD_BUS_TYPE_DOUBLE: {
1158 double d, *p = userdata;
1159
1160 r = sd_bus_message_read_basic(m, type, &d);
1161 if (r < 0)
1162 return r;
1163
1164 *p = d;
1165 return 0;
1166 }}
1167
1168 return -EOPNOTSUPP;
1169 }
1170
1171 int bus_message_map_all_properties(
1172 sd_bus_message *m,
1173 const struct bus_properties_map *map,
1174 unsigned flags,
1175 sd_bus_error *error,
1176 void *userdata) {
1177
1178 int r;
1179
1180 assert(m);
1181 assert(map);
1182
1183 r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, "{sv}");
1184 if (r < 0)
1185 return r;
1186
1187 while ((r = sd_bus_message_enter_container(m, SD_BUS_TYPE_DICT_ENTRY, "sv")) > 0) {
1188 const struct bus_properties_map *prop;
1189 const char *member;
1190 const char *contents;
1191 void *v;
1192 unsigned i;
1193
1194 r = sd_bus_message_read_basic(m, SD_BUS_TYPE_STRING, &member);
1195 if (r < 0)
1196 return r;
1197
1198 for (i = 0, prop = NULL; map[i].member; i++)
1199 if (streq(map[i].member, member)) {
1200 prop = &map[i];
1201 break;
1202 }
1203
1204 if (prop) {
1205 r = sd_bus_message_peek_type(m, NULL, &contents);
1206 if (r < 0)
1207 return r;
1208
1209 r = sd_bus_message_enter_container(m, SD_BUS_TYPE_VARIANT, contents);
1210 if (r < 0)
1211 return r;
1212
1213 v = (uint8_t *)userdata + prop->offset;
1214 if (map[i].set)
1215 r = prop->set(sd_bus_message_get_bus(m), member, m, error, v);
1216 else
1217 r = map_basic(sd_bus_message_get_bus(m), member, m, flags, error, v);
1218 if (r < 0)
1219 return r;
1220
1221 r = sd_bus_message_exit_container(m);
1222 if (r < 0)
1223 return r;
1224 } else {
1225 r = sd_bus_message_skip(m, "v");
1226 if (r < 0)
1227 return r;
1228 }
1229
1230 r = sd_bus_message_exit_container(m);
1231 if (r < 0)
1232 return r;
1233 }
1234 if (r < 0)
1235 return r;
1236
1237 return sd_bus_message_exit_container(m);
1238 }
1239
1240 int bus_map_all_properties(
1241 sd_bus *bus,
1242 const char *destination,
1243 const char *path,
1244 const struct bus_properties_map *map,
1245 unsigned flags,
1246 sd_bus_error *error,
1247 sd_bus_message **reply,
1248 void *userdata) {
1249
1250 _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
1251 int r;
1252
1253 assert(bus);
1254 assert(destination);
1255 assert(path);
1256 assert(map);
1257 assert(reply || (flags & BUS_MAP_STRDUP));
1258
1259 r = sd_bus_call_method(
1260 bus,
1261 destination,
1262 path,
1263 "org.freedesktop.DBus.Properties",
1264 "GetAll",
1265 error,
1266 &m,
1267 "s", "");
1268 if (r < 0)
1269 return r;
1270
1271 r = bus_message_map_all_properties(m, map, flags, error, userdata);
1272 if (r < 0)
1273 return r;
1274
1275 if (reply)
1276 *reply = sd_bus_message_ref(m);
1277
1278 return r;
1279 }
1280
1281 int bus_connect_transport(BusTransport transport, const char *host, bool user, sd_bus **ret) {
1282 _cleanup_(sd_bus_unrefp) sd_bus *bus = NULL;
1283 int r;
1284
1285 assert(transport >= 0);
1286 assert(transport < _BUS_TRANSPORT_MAX);
1287 assert(ret);
1288
1289 assert_return((transport == BUS_TRANSPORT_LOCAL) == !host, -EINVAL);
1290 assert_return(transport == BUS_TRANSPORT_LOCAL || !user, -EOPNOTSUPP);
1291
1292 switch (transport) {
1293
1294 case BUS_TRANSPORT_LOCAL:
1295 if (user)
1296 r = sd_bus_default_user(&bus);
1297 else {
1298 if (sd_booted() <= 0) {
1299 /* Print a friendly message when the local system is actually not running systemd as PID 1. */
1300 log_error("System has not been booted with systemd as init system (PID 1). Can't operate.");
1301
1302 return -EHOSTDOWN;
1303 }
1304 r = sd_bus_default_system(&bus);
1305 }
1306 break;
1307
1308 case BUS_TRANSPORT_REMOTE:
1309 r = sd_bus_open_system_remote(&bus, host);
1310 break;
1311
1312 case BUS_TRANSPORT_MACHINE:
1313 r = sd_bus_open_system_machine(&bus, host);
1314 break;
1315
1316 default:
1317 assert_not_reached("Hmm, unknown transport type.");
1318 }
1319 if (r < 0)
1320 return r;
1321
1322 r = sd_bus_set_exit_on_disconnect(bus, true);
1323 if (r < 0)
1324 return r;
1325
1326 *ret = TAKE_PTR(bus);
1327
1328 return 0;
1329 }
1330
1331 int bus_connect_transport_systemd(BusTransport transport, const char *host, bool user, sd_bus **bus) {
1332 int r;
1333
1334 assert(transport >= 0);
1335 assert(transport < _BUS_TRANSPORT_MAX);
1336 assert(bus);
1337
1338 assert_return((transport == BUS_TRANSPORT_LOCAL) == !host, -EINVAL);
1339 assert_return(transport == BUS_TRANSPORT_LOCAL || !user, -EOPNOTSUPP);
1340
1341 switch (transport) {
1342
1343 case BUS_TRANSPORT_LOCAL:
1344 if (user)
1345 r = bus_connect_user_systemd(bus);
1346 else {
1347 if (sd_booted() <= 0)
1348 /* Print a friendly message when the local system is actually not running systemd as PID 1. */
1349 return log_error_errno(SYNTHETIC_ERRNO(EHOSTDOWN),
1350 "System has not been booted with systemd as init system (PID 1). Can't operate.");
1351 r = bus_connect_system_systemd(bus);
1352 }
1353 break;
1354
1355 case BUS_TRANSPORT_REMOTE:
1356 r = sd_bus_open_system_remote(bus, host);
1357 break;
1358
1359 case BUS_TRANSPORT_MACHINE:
1360 r = sd_bus_open_system_machine(bus, host);
1361 break;
1362
1363 default:
1364 assert_not_reached("Hmm, unknown transport type.");
1365 }
1366
1367 return r;
1368 }
1369
1370 int bus_property_get_bool(
1371 sd_bus *bus,
1372 const char *path,
1373 const char *interface,
1374 const char *property,
1375 sd_bus_message *reply,
1376 void *userdata,
1377 sd_bus_error *error) {
1378
1379 int b = *(bool*) userdata;
1380
1381 return sd_bus_message_append_basic(reply, 'b', &b);
1382 }
1383
1384 int bus_property_set_bool(
1385 sd_bus *bus,
1386 const char *path,
1387 const char *interface,
1388 const char *property,
1389 sd_bus_message *value,
1390 void *userdata,
1391 sd_bus_error *error) {
1392
1393 int b, r;
1394
1395 r = sd_bus_message_read(value, "b", &b);
1396 if (r < 0)
1397 return r;
1398
1399 *(bool*) userdata = b;
1400 return 0;
1401 }
1402
1403 int bus_property_get_id128(
1404 sd_bus *bus,
1405 const char *path,
1406 const char *interface,
1407 const char *property,
1408 sd_bus_message *reply,
1409 void *userdata,
1410 sd_bus_error *error) {
1411
1412 sd_id128_t *id = userdata;
1413
1414 if (sd_id128_is_null(*id)) /* Add an empty array if the ID is zero */
1415 return sd_bus_message_append(reply, "ay", 0);
1416 else
1417 return sd_bus_message_append_array(reply, 'y', id->bytes, 16);
1418 }
1419
1420 #if __SIZEOF_SIZE_T__ != 8
1421 int bus_property_get_size(
1422 sd_bus *bus,
1423 const char *path,
1424 const char *interface,
1425 const char *property,
1426 sd_bus_message *reply,
1427 void *userdata,
1428 sd_bus_error *error) {
1429
1430 uint64_t sz = *(size_t*) userdata;
1431
1432 return sd_bus_message_append_basic(reply, 't', &sz);
1433 }
1434 #endif
1435
1436 #if __SIZEOF_LONG__ != 8
1437 int bus_property_get_long(
1438 sd_bus *bus,
1439 const char *path,
1440 const char *interface,
1441 const char *property,
1442 sd_bus_message *reply,
1443 void *userdata,
1444 sd_bus_error *error) {
1445
1446 int64_t l = *(long*) userdata;
1447
1448 return sd_bus_message_append_basic(reply, 'x', &l);
1449 }
1450
1451 int bus_property_get_ulong(
1452 sd_bus *bus,
1453 const char *path,
1454 const char *interface,
1455 const char *property,
1456 sd_bus_message *reply,
1457 void *userdata,
1458 sd_bus_error *error) {
1459
1460 uint64_t ul = *(unsigned long*) userdata;
1461
1462 return sd_bus_message_append_basic(reply, 't', &ul);
1463 }
1464 #endif
1465
1466 int bus_log_parse_error(int r) {
1467 return log_error_errno(r, "Failed to parse bus message: %m");
1468 }
1469
1470 int bus_log_create_error(int r) {
1471 return log_error_errno(r, "Failed to create bus message: %m");
1472 }
1473
1474 /**
1475 * bus_path_encode_unique() - encode unique object path
1476 * @b: bus connection or NULL
1477 * @prefix: object path prefix
1478 * @sender_id: unique-name of client, or NULL
1479 * @external_id: external ID to be chosen by client, or NULL
1480 * @ret_path: storage for encoded object path pointer
1481 *
1482 * Whenever we provide a bus API that allows clients to create and manage
1483 * server-side objects, we need to provide a unique name for these objects. If
1484 * we let the server choose the name, we suffer from a race condition: If a
1485 * client creates an object asynchronously, it cannot destroy that object until
1486 * it received the method reply. It cannot know the name of the new object,
1487 * thus, it cannot destroy it. Furthermore, it enforces a round-trip.
1488 *
1489 * Therefore, many APIs allow the client to choose the unique name for newly
1490 * created objects. There're two problems to solve, though:
1491 * 1) Object names are usually defined via dbus object paths, which are
1492 * usually globally namespaced. Therefore, multiple clients must be able
1493 * to choose unique object names without interference.
1494 * 2) If multiple libraries share the same bus connection, they must be
1495 * able to choose unique object names without interference.
1496 * The first problem is solved easily by prefixing a name with the
1497 * unique-bus-name of a connection. The server side must enforce this and
1498 * reject any other name. The second problem is solved by providing unique
1499 * suffixes from within sd-bus.
1500 *
1501 * This helper allows clients to create unique object-paths. It uses the
1502 * template '/prefix/sender_id/external_id' and returns the new path in
1503 * @ret_path (must be freed by the caller).
1504 * If @sender_id is NULL, the unique-name of @b is used. If @external_id is
1505 * NULL, this function allocates a unique suffix via @b (by requesting a new
1506 * cookie). If both @sender_id and @external_id are given, @b can be passed as
1507 * NULL.
1508 *
1509 * Returns: 0 on success, negative error code on failure.
1510 */
1511 int bus_path_encode_unique(sd_bus *b, const char *prefix, const char *sender_id, const char *external_id, char **ret_path) {
1512 _cleanup_free_ char *sender_label = NULL, *external_label = NULL;
1513 char external_buf[DECIMAL_STR_MAX(uint64_t)], *p;
1514 int r;
1515
1516 assert_return(b || (sender_id && external_id), -EINVAL);
1517 assert_return(object_path_is_valid(prefix), -EINVAL);
1518 assert_return(ret_path, -EINVAL);
1519
1520 if (!sender_id) {
1521 r = sd_bus_get_unique_name(b, &sender_id);
1522 if (r < 0)
1523 return r;
1524 }
1525
1526 if (!external_id) {
1527 xsprintf(external_buf, "%"PRIu64, ++b->cookie);
1528 external_id = external_buf;
1529 }
1530
1531 sender_label = bus_label_escape(sender_id);
1532 if (!sender_label)
1533 return -ENOMEM;
1534
1535 external_label = bus_label_escape(external_id);
1536 if (!external_label)
1537 return -ENOMEM;
1538
1539 p = strjoin(prefix, "/", sender_label, "/", external_label);
1540 if (!p)
1541 return -ENOMEM;
1542
1543 *ret_path = p;
1544 return 0;
1545 }
1546
1547 /**
1548 * bus_path_decode_unique() - decode unique object path
1549 * @path: object path to decode
1550 * @prefix: object path prefix
1551 * @ret_sender: output parameter for sender-id label
1552 * @ret_external: output parameter for external-id label
1553 *
1554 * This does the reverse of bus_path_encode_unique() (see its description for
1555 * details). Both trailing labels, sender-id and external-id, are unescaped and
1556 * returned in the given output parameters (the caller must free them).
1557 *
1558 * Note that this function returns 0 if the path does not match the template
1559 * (see bus_path_encode_unique()), 1 if it matched.
1560 *
1561 * Returns: Negative error code on failure, 0 if the given object path does not
1562 * match the template (return parameters are set to NULL), 1 if it was
1563 * parsed successfully (return parameters contain allocated labels).
1564 */
1565 int bus_path_decode_unique(const char *path, const char *prefix, char **ret_sender, char **ret_external) {
1566 const char *p, *q;
1567 char *sender, *external;
1568
1569 assert(object_path_is_valid(path));
1570 assert(object_path_is_valid(prefix));
1571 assert(ret_sender);
1572 assert(ret_external);
1573
1574 p = object_path_startswith(path, prefix);
1575 if (!p) {
1576 *ret_sender = NULL;
1577 *ret_external = NULL;
1578 return 0;
1579 }
1580
1581 q = strchr(p, '/');
1582 if (!q) {
1583 *ret_sender = NULL;
1584 *ret_external = NULL;
1585 return 0;
1586 }
1587
1588 sender = bus_label_unescape_n(p, q - p);
1589 external = bus_label_unescape(q + 1);
1590 if (!sender || !external) {
1591 free(sender);
1592 free(external);
1593 return -ENOMEM;
1594 }
1595
1596 *ret_sender = sender;
1597 *ret_external = external;
1598 return 1;
1599 }
1600
1601 int bus_property_get_rlimit(
1602 sd_bus *bus,
1603 const char *path,
1604 const char *interface,
1605 const char *property,
1606 sd_bus_message *reply,
1607 void *userdata,
1608 sd_bus_error *error) {
1609
1610 const char *is_soft;
1611 struct rlimit *rl;
1612 uint64_t u;
1613 rlim_t x;
1614
1615 assert(bus);
1616 assert(reply);
1617 assert(userdata);
1618
1619 is_soft = endswith(property, "Soft");
1620
1621 rl = *(struct rlimit**) userdata;
1622 if (rl)
1623 x = is_soft ? rl->rlim_cur : rl->rlim_max;
1624 else {
1625 struct rlimit buf = {};
1626 const char *s, *p;
1627 int z;
1628
1629 /* Chop off "Soft" suffix */
1630 s = is_soft ? strndupa(property, is_soft - property) : property;
1631
1632 /* Skip over any prefix, such as "Default" */
1633 assert_se(p = strstr(s, "Limit"));
1634
1635 z = rlimit_from_string(p + 5);
1636 assert(z >= 0);
1637
1638 (void) getrlimit(z, &buf);
1639 x = is_soft ? buf.rlim_cur : buf.rlim_max;
1640 }
1641
1642 /* rlim_t might have different sizes, let's map RLIMIT_INFINITY to (uint64_t) -1, so that it is the same on all
1643 * archs */
1644 u = x == RLIM_INFINITY ? (uint64_t) -1 : (uint64_t) x;
1645
1646 return sd_bus_message_append(reply, "t", u);
1647 }
1648
1649 int bus_track_add_name_many(sd_bus_track *t, char **l) {
1650 int r = 0;
1651 char **i;
1652
1653 assert(t);
1654
1655 /* Continues adding after failure, and returns the first failure. */
1656
1657 STRV_FOREACH(i, l) {
1658 int k;
1659
1660 k = sd_bus_track_add_name(t, *i);
1661 if (k < 0 && r >= 0)
1662 r = k;
1663 }
1664
1665 return r;
1666 }
1667
1668 int bus_open_system_watch_bind_with_description(sd_bus **ret, const char *description) {
1669 _cleanup_(sd_bus_unrefp) sd_bus *bus = NULL;
1670 const char *e;
1671 int r;
1672
1673 assert(ret);
1674
1675 /* Match like sd_bus_open_system(), but with the "watch_bind" feature and the Connected() signal turned on. */
1676
1677 r = sd_bus_new(&bus);
1678 if (r < 0)
1679 return r;
1680
1681 if (description) {
1682 r = sd_bus_set_description(bus, description);
1683 if (r < 0)
1684 return r;
1685 }
1686
1687 e = secure_getenv("DBUS_SYSTEM_BUS_ADDRESS");
1688 if (!e)
1689 e = DEFAULT_SYSTEM_BUS_ADDRESS;
1690
1691 r = sd_bus_set_address(bus, e);
1692 if (r < 0)
1693 return r;
1694
1695 r = sd_bus_set_bus_client(bus, true);
1696 if (r < 0)
1697 return r;
1698
1699 r = sd_bus_set_trusted(bus, true);
1700 if (r < 0)
1701 return r;
1702
1703 r = sd_bus_negotiate_creds(bus, true, SD_BUS_CREDS_UID|SD_BUS_CREDS_EUID|SD_BUS_CREDS_EFFECTIVE_CAPS);
1704 if (r < 0)
1705 return r;
1706
1707 r = sd_bus_set_watch_bind(bus, true);
1708 if (r < 0)
1709 return r;
1710
1711 r = sd_bus_set_connected_signal(bus, true);
1712 if (r < 0)
1713 return r;
1714
1715 r = sd_bus_start(bus);
1716 if (r < 0)
1717 return r;
1718
1719 *ret = TAKE_PTR(bus);
1720
1721 return 0;
1722 }
1723
1724 int bus_reply_pair_array(sd_bus_message *m, char **l) {
1725 _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
1726 char **k, **v;
1727 int r;
1728
1729 assert(m);
1730
1731 /* Reply to the specified message with a message containing a dictionary put together from the specified
1732 * strv */
1733
1734 r = sd_bus_message_new_method_return(m, &reply);
1735 if (r < 0)
1736 return r;
1737
1738 r = sd_bus_message_open_container(reply, 'a', "{ss}");
1739 if (r < 0)
1740 return r;
1741
1742 STRV_FOREACH_PAIR(k, v, l) {
1743 r = sd_bus_message_append(reply, "{ss}", *k, *v);
1744 if (r < 0)
1745 return r;
1746 }
1747
1748 r = sd_bus_message_close_container(reply);
1749 if (r < 0)
1750 return r;
1751
1752 return sd_bus_send(NULL, reply, NULL);
1753 }
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