1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 Copyright 2013 Lennart Poettering
12 #include <sys/ioctl.h>
13 #include <sys/resource.h>
14 #include <sys/socket.h>
17 #include "sd-bus-protocol.h"
19 #include "sd-daemon.h"
23 #include "alloc-util.h"
24 #include "bus-internal.h"
25 #include "bus-label.h"
26 #include "bus-message.h"
29 #include "cgroup-util.h"
34 #include "mount-util.h"
36 #include "parse-util.h"
37 #include "proc-cmdline.h"
38 //#include "rlimit-util.h"
39 #include "stdio-util.h"
41 #include "user-util.h"
43 #if 0 /// UNNEEDED by elogind
44 static int name_owner_change_callback(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
45 sd_event *e = userdata;
50 sd_bus_close(sd_bus_message_get_bus(m));
56 int bus_async_unregister_and_exit(sd_event *e, sd_bus *bus, const char *name) {
65 /* We unregister the name here and then wait for the
66 * NameOwnerChanged signal for this event to arrive before we
67 * quit. We do this in order to make sure that any queued
68 * requests are still processed before we really exit. */
70 r = sd_bus_get_unique_name(bus, &unique);
75 "sender='org.freedesktop.DBus',"
77 "interface='org.freedesktop.DBus',"
78 "member='NameOwnerChanged',"
79 "path='/org/freedesktop/DBus',"
81 "arg1='", unique, "',",
84 r = sd_bus_add_match_async(bus, NULL, match, name_owner_change_callback, NULL, e);
88 r = sd_bus_release_name_async(bus, NULL, name, NULL, NULL);
95 int bus_event_loop_with_idle(
100 check_idle_t check_idle,
102 bool exiting = false;
112 r = sd_event_get_state(e);
115 if (r == SD_EVENT_FINISHED)
119 idle = check_idle(userdata);
123 r = sd_event_run(e, exiting || !idle ? (uint64_t) -1 : timeout);
127 if (r == 0 && !exiting && idle) {
129 r = sd_bus_try_close(bus);
133 /* Fallback for dbus1 connections: we
134 * unregister the name and wait for the
135 * response to come through for it */
136 if (r == -EOPNOTSUPP) {
138 /* Inform the service manager that we
139 * are going down, so that it will
140 * queue all further start requests,
141 * instead of assuming we are already
143 sd_notify(false, "STOPPING=1");
145 r = bus_async_unregister_and_exit(e, bus, name);
161 r = sd_event_get_exit_code(e, &code);
169 int bus_name_has_owner(sd_bus *c, const char *name, sd_bus_error *error) {
170 _cleanup_(sd_bus_message_unrefp) sd_bus_message *rep = NULL;
171 int r, has_owner = 0;
176 r = sd_bus_call_method(c,
177 "org.freedesktop.DBus",
178 "/org/freedesktop/dbus",
179 "org.freedesktop.DBus",
188 r = sd_bus_message_read_basic(rep, 'b', &has_owner);
190 return sd_bus_error_set_errno(error, r);
195 static int check_good_user(sd_bus_message *m, uid_t good_user) {
196 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
202 if (good_user == UID_INVALID)
205 r = sd_bus_query_sender_creds(m, SD_BUS_CREDS_EUID, &creds);
209 /* Don't trust augmented credentials for authorization */
210 assert_return((sd_bus_creds_get_augmented_mask(creds) & SD_BUS_CREDS_EUID) == 0, -EPERM);
212 r = sd_bus_creds_get_euid(creds, &sender_uid);
216 return sender_uid == good_user;
220 sd_bus_message *call,
223 const char **details,
233 /* Tests non-interactively! */
235 r = check_good_user(call, good_user);
239 r = sd_bus_query_sender_privilege(call, capability);
246 _cleanup_(sd_bus_message_unrefp) sd_bus_message *request = NULL;
247 _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
248 int authorized = false, challenge = false;
249 const char *sender, **k, **v;
251 sender = sd_bus_message_get_sender(call);
255 r = sd_bus_message_new_method_call(
258 "org.freedesktop.PolicyKit1",
259 "/org/freedesktop/PolicyKit1/Authority",
260 "org.freedesktop.PolicyKit1.Authority",
261 "CheckAuthorization");
265 r = sd_bus_message_append(
268 "system-bus-name", 1, "name", "s", sender,
273 r = sd_bus_message_open_container(request, 'a', "{ss}");
277 STRV_FOREACH_PAIR(k, v, details) {
278 r = sd_bus_message_append(request, "{ss}", *k, *v);
283 r = sd_bus_message_close_container(request);
287 r = sd_bus_message_append(request, "us", 0, NULL);
291 r = sd_bus_call(call->bus, request, 0, e, &reply);
293 /* Treat no PK available as access denied */
294 if (sd_bus_error_has_name(e, SD_BUS_ERROR_SERVICE_UNKNOWN)) {
295 sd_bus_error_free(e);
302 r = sd_bus_message_enter_container(reply, 'r', "bba{ss}");
306 r = sd_bus_message_read(reply, "bb", &authorized, &challenge);
314 *_challenge = challenge;
325 typedef struct AsyncPolkitQuery {
326 sd_bus_message *request, *reply;
327 sd_bus_message_handler_t callback;
333 static void async_polkit_query_free(AsyncPolkitQuery *q) {
338 sd_bus_slot_unref(q->slot);
340 if (q->registry && q->request)
341 hashmap_remove(q->registry, q->request);
343 sd_bus_message_unref(q->request);
344 sd_bus_message_unref(q->reply);
349 static int async_polkit_callback(sd_bus_message *reply, void *userdata, sd_bus_error *error) {
350 _cleanup_(sd_bus_error_free) sd_bus_error error_buffer = SD_BUS_ERROR_NULL;
351 AsyncPolkitQuery *q = userdata;
357 q->slot = sd_bus_slot_unref(q->slot);
358 q->reply = sd_bus_message_ref(reply);
360 r = sd_bus_message_rewind(q->request, true);
362 r = sd_bus_reply_method_errno(q->request, r, NULL);
366 r = q->callback(q->request, q->userdata, &error_buffer);
367 r = bus_maybe_reply_error(q->request, r, &error_buffer);
370 async_polkit_query_free(q);
377 int bus_verify_polkit_async(
378 sd_bus_message *call,
381 const char **details,
385 sd_bus_error *error) {
388 _cleanup_(sd_bus_message_unrefp) sd_bus_message *pk = NULL;
390 const char *sender, **k, **v;
391 sd_bus_message_handler_t callback;
401 r = check_good_user(call, good_user);
406 q = hashmap_get(*registry, call);
408 int authorized, challenge;
410 /* This is the second invocation of this function, and
411 * there's already a response from polkit, let's
415 if (sd_bus_message_is_method_error(q->reply, NULL)) {
416 const sd_bus_error *e;
418 /* Copy error from polkit reply */
419 e = sd_bus_message_get_error(q->reply);
420 sd_bus_error_copy(error, e);
422 /* Treat no PK available as access denied */
423 if (sd_bus_error_has_name(e, SD_BUS_ERROR_SERVICE_UNKNOWN))
426 return -sd_bus_error_get_errno(e);
429 r = sd_bus_message_enter_container(q->reply, 'r', "bba{ss}");
431 r = sd_bus_message_read(q->reply, "bb", &authorized, &challenge);
440 return sd_bus_error_set(error, SD_BUS_ERROR_INTERACTIVE_AUTHORIZATION_REQUIRED, "Interactive authentication required.");
446 r = sd_bus_query_sender_privilege(call, capability);
453 if (sd_bus_get_current_message(call->bus) != call)
456 callback = sd_bus_get_current_handler(call->bus);
460 userdata = sd_bus_get_current_userdata(call->bus);
462 sender = sd_bus_message_get_sender(call);
466 c = sd_bus_message_get_allow_interactive_authorization(call);
472 r = hashmap_ensure_allocated(registry, NULL);
476 r = sd_bus_message_new_method_call(
479 "org.freedesktop.PolicyKit1",
480 "/org/freedesktop/PolicyKit1/Authority",
481 "org.freedesktop.PolicyKit1.Authority",
482 "CheckAuthorization");
486 r = sd_bus_message_append(
489 "system-bus-name", 1, "name", "s", sender,
494 r = sd_bus_message_open_container(pk, 'a', "{ss}");
498 STRV_FOREACH_PAIR(k, v, details) {
499 r = sd_bus_message_append(pk, "{ss}", *k, *v);
504 r = sd_bus_message_close_container(pk);
508 r = sd_bus_message_append(pk, "us", !!interactive, NULL);
512 q = new0(AsyncPolkitQuery, 1);
516 q->request = sd_bus_message_ref(call);
517 q->callback = callback;
518 q->userdata = userdata;
520 r = hashmap_put(*registry, call, q);
522 async_polkit_query_free(q);
526 q->registry = *registry;
528 r = sd_bus_call_async(call->bus, &q->slot, pk, async_polkit_callback, q, 0);
530 async_polkit_query_free(q);
540 void bus_verify_polkit_async_registry_free(Hashmap *registry) {
542 hashmap_free_with_destructor(registry, async_polkit_query_free);
546 #if 0 /// UNNEEDED by elogind
547 int bus_check_peercred(sd_bus *c) {
553 fd = sd_bus_get_fd(c);
557 r = getpeercred(fd, &ucred);
561 if (ucred.uid != 0 && ucred.uid != geteuid())
567 int bus_connect_system_systemd(sd_bus **_bus) {
568 _cleanup_(sd_bus_unrefp) sd_bus *bus = NULL;
574 return sd_bus_default_system(_bus);
576 /* If we are root then let's talk directly to the system
577 * instance, instead of going via the bus */
579 r = sd_bus_new(&bus);
583 r = sd_bus_set_address(bus, "unix:path=/run/systemd/private");
587 r = sd_bus_start(bus);
589 return sd_bus_default_system(_bus);
591 r = bus_check_peercred(bus);
595 *_bus = TAKE_PTR(bus);
600 int bus_connect_user_systemd(sd_bus **_bus) {
601 _cleanup_(sd_bus_unrefp) sd_bus *bus = NULL;
602 _cleanup_free_ char *ee = NULL;
608 e = secure_getenv("XDG_RUNTIME_DIR");
610 return sd_bus_default_user(_bus);
612 ee = bus_address_escape(e);
616 r = sd_bus_new(&bus);
620 bus->address = strjoin("unix:path=", ee, "/systemd/private");
624 r = sd_bus_start(bus);
626 return sd_bus_default_user(_bus);
628 r = bus_check_peercred(bus);
632 *_bus = TAKE_PTR(bus);
638 #define print_property(name, fmt, ...) \
641 printf(fmt "\n", __VA_ARGS__); \
643 printf("%s=" fmt "\n", name, __VA_ARGS__); \
646 int bus_print_property(const char *name, sd_bus_message *m, bool value, bool all) {
648 const char *contents;
654 r = sd_bus_message_peek_type(m, &type, &contents);
660 case SD_BUS_TYPE_STRING: {
663 r = sd_bus_message_read_basic(m, type, &s);
667 if (all || !isempty(s)) {
670 /* This property has a single value, so we need to take
671 * care not to print a new line, everything else is OK. */
672 good = !strchr(s, '\n');
673 print_property(name, "%s", good ? s : "[unprintable]");
679 case SD_BUS_TYPE_BOOLEAN: {
682 r = sd_bus_message_read_basic(m, type, &b);
686 print_property(name, "%s", yes_no(b));
691 case SD_BUS_TYPE_UINT64: {
694 r = sd_bus_message_read_basic(m, type, &u);
698 /* Yes, heuristics! But we can change this check
699 * should it turn out to not be sufficient */
701 if (endswith(name, "Timestamp") ||
702 STR_IN_SET(name, "NextElapseUSecRealtime", "LastTriggerUSec", "TimeUSec", "RTCTimeUSec")) {
703 char timestamp[FORMAT_TIMESTAMP_MAX];
706 t = format_timestamp(timestamp, sizeof(timestamp), u);
708 print_property(name, "%s", strempty(t));
710 } else if (strstr(name, "USec")) {
711 char timespan[FORMAT_TIMESPAN_MAX];
713 print_property(name, "%s", format_timespan(timespan, sizeof(timespan), u, 0));
714 } else if (streq(name, "RestrictNamespaces")) {
715 _cleanup_free_ char *s = NULL;
718 if ((u & NAMESPACE_FLAGS_ALL) == 0)
720 else if ((u & NAMESPACE_FLAGS_ALL) == NAMESPACE_FLAGS_ALL)
723 r = namespace_flags_to_string(u, &s);
730 print_property(name, "%s", result);
732 } else if (streq(name, "MountFlags")) {
735 result = mount_propagation_flags_to_string(u);
739 print_property(name, "%s", result);
741 } else if (STR_IN_SET(name, "CapabilityBoundingSet", "AmbientCapabilities")) {
742 _cleanup_free_ char *s = NULL;
744 r = capability_set_to_string_alloc(u, &s);
748 print_property(name, "%s", s);
750 } else if ((STR_IN_SET(name, "CPUWeight", "StartupCPUWeight", "IOWeight", "StartupIOWeight") && u == CGROUP_WEIGHT_INVALID) ||
751 (STR_IN_SET(name, "CPUShares", "StartupCPUShares") && u == CGROUP_CPU_SHARES_INVALID) ||
752 (STR_IN_SET(name, "BlockIOWeight", "StartupBlockIOWeight") && u == CGROUP_BLKIO_WEIGHT_INVALID) ||
753 (STR_IN_SET(name, "MemoryCurrent", "TasksCurrent") && u == (uint64_t) -1) ||
754 (endswith(name, "NSec") && u == (uint64_t) -1))
756 print_property(name, "%s", "[not set]");
758 else if ((STR_IN_SET(name, "MemoryLow", "MemoryHigh", "MemoryMax", "MemorySwapMax", "MemoryLimit") && u == CGROUP_LIMIT_MAX) ||
759 (STR_IN_SET(name, "TasksMax", "DefaultTasksMax") && u == (uint64_t) -1) ||
760 (startswith(name, "Limit") && u == (uint64_t) -1) ||
761 (startswith(name, "DefaultLimit") && u == (uint64_t) -1))
763 print_property(name, "%s", "infinity");
765 print_property(name, "%"PRIu64, u);
770 case SD_BUS_TYPE_INT64: {
773 r = sd_bus_message_read_basic(m, type, &i);
777 print_property(name, "%"PRIi64, i);
782 case SD_BUS_TYPE_UINT32: {
785 r = sd_bus_message_read_basic(m, type, &u);
789 if (strstr(name, "UMask") || strstr(name, "Mode"))
790 print_property(name, "%04o", u);
791 else if (streq(name, "UID")) {
792 if (u == UID_INVALID)
793 print_property(name, "%s", "[not set]");
795 print_property(name, "%"PRIu32, u);
796 } else if (streq(name, "GID")) {
797 if (u == GID_INVALID)
798 print_property(name, "%s", "[not set]");
800 print_property(name, "%"PRIu32, u);
802 print_property(name, "%"PRIu32, u);
807 case SD_BUS_TYPE_INT32: {
810 r = sd_bus_message_read_basic(m, type, &i);
814 print_property(name, "%"PRIi32, i);
818 case SD_BUS_TYPE_DOUBLE: {
821 r = sd_bus_message_read_basic(m, type, &d);
825 print_property(name, "%g", d);
829 case SD_BUS_TYPE_ARRAY:
830 if (streq(contents, "s")) {
834 r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, contents);
838 while ((r = sd_bus_message_read_basic(m, SD_BUS_TYPE_STRING, &str)) > 0) {
844 /* This property has multiple space-separated values, so
845 * neither spaces nor newlines can be allowed in a value. */
846 good = str[strcspn(str, " \n")] == '\0';
848 printf("%s%s", first ? "" : " ", good ? str : "[unprintable]");
855 if (first && all && !value)
860 r = sd_bus_message_exit_container(m);
866 } else if (streq(contents, "y")) {
870 r = sd_bus_message_read_array(m, SD_BUS_TYPE_BYTE, (const void**) &u, &n);
880 for (i = 0; i < n; i++)
881 printf("%02x", u[i]);
888 } else if (streq(contents, "u")) {
892 r = sd_bus_message_read_array(m, SD_BUS_TYPE_UINT32, (const void**) &u, &n);
902 for (i = 0; i < n; i++)
903 printf("%08x", u[i]);
917 int bus_message_print_all_properties(
919 bus_message_print_t func,
923 Set **found_properties) {
929 r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, "{sv}");
933 while ((r = sd_bus_message_enter_container(m, SD_BUS_TYPE_DICT_ENTRY, "sv")) > 0) {
935 const char *contents;
937 r = sd_bus_message_read_basic(m, SD_BUS_TYPE_STRING, &name);
941 if (found_properties) {
942 r = set_ensure_allocated(found_properties, &string_hash_ops);
946 r = set_put(*found_properties, name);
947 if (r < 0 && r != EEXIST)
951 if (!filter || strv_find(filter, name)) {
952 r = sd_bus_message_peek_type(m, NULL, &contents);
956 r = sd_bus_message_enter_container(m, SD_BUS_TYPE_VARIANT, contents);
961 r = func(name, m, value, all);
963 r = bus_print_property(name, m, value, all);
968 printf("%s=[unprintable]\n", name);
969 /* skip what we didn't read */
970 r = sd_bus_message_skip(m, contents);
975 r = sd_bus_message_exit_container(m);
979 r = sd_bus_message_skip(m, "v");
984 r = sd_bus_message_exit_container(m);
991 r = sd_bus_message_exit_container(m);
998 int bus_print_all_properties(
1002 bus_message_print_t func,
1006 Set **found_properties) {
1008 _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
1009 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1015 r = sd_bus_call_method(bus,
1018 "org.freedesktop.DBus.Properties",
1026 return bus_message_print_all_properties(reply, func, filter, value, all, found_properties);
1029 int bus_map_id128(sd_bus *bus, const char *member, sd_bus_message *m, sd_bus_error *error, void *userdata) {
1030 sd_id128_t *p = userdata;
1035 r = sd_bus_message_read_array(m, SD_BUS_TYPE_BYTE, &v, &n);
1042 memcpy((*p).bytes, v, n);
1049 static int map_basic(sd_bus *bus, const char *member, sd_bus_message *m, unsigned flags, sd_bus_error *error, void *userdata) {
1053 r = sd_bus_message_peek_type(m, &type, NULL);
1059 case SD_BUS_TYPE_STRING: {
1060 const char **p = userdata;
1063 r = sd_bus_message_read_basic(m, type, &s);
1070 if (flags & BUS_MAP_STRDUP)
1071 return free_and_strdup((char **) userdata, s);
1077 case SD_BUS_TYPE_ARRAY: {
1078 _cleanup_strv_free_ char **l = NULL;
1079 char ***p = userdata;
1081 r = bus_message_read_strv_extend(m, &l);
1085 return strv_free_and_replace(*p, l);
1088 case SD_BUS_TYPE_BOOLEAN: {
1091 r = sd_bus_message_read_basic(m, type, &b);
1095 if (flags & BUS_MAP_BOOLEAN_AS_BOOL)
1096 *(bool*) userdata = b;
1098 *(int*) userdata = b;
1103 case SD_BUS_TYPE_INT32:
1104 case SD_BUS_TYPE_UINT32: {
1105 uint32_t u, *p = userdata;
1107 r = sd_bus_message_read_basic(m, type, &u);
1115 case SD_BUS_TYPE_INT64:
1116 case SD_BUS_TYPE_UINT64: {
1117 uint64_t t, *p = userdata;
1119 r = sd_bus_message_read_basic(m, type, &t);
1127 case SD_BUS_TYPE_DOUBLE: {
1128 double d, *p = userdata;
1130 r = sd_bus_message_read_basic(m, type, &d);
1141 int bus_message_map_all_properties(
1143 const struct bus_properties_map *map,
1145 sd_bus_error *error,
1153 r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, "{sv}");
1157 while ((r = sd_bus_message_enter_container(m, SD_BUS_TYPE_DICT_ENTRY, "sv")) > 0) {
1158 const struct bus_properties_map *prop;
1160 const char *contents;
1164 r = sd_bus_message_read_basic(m, SD_BUS_TYPE_STRING, &member);
1168 for (i = 0, prop = NULL; map[i].member; i++)
1169 if (streq(map[i].member, member)) {
1175 r = sd_bus_message_peek_type(m, NULL, &contents);
1179 r = sd_bus_message_enter_container(m, SD_BUS_TYPE_VARIANT, contents);
1183 v = (uint8_t *)userdata + prop->offset;
1185 r = prop->set(sd_bus_message_get_bus(m), member, m, error, v);
1187 r = map_basic(sd_bus_message_get_bus(m), member, m, flags, error, v);
1191 r = sd_bus_message_exit_container(m);
1195 r = sd_bus_message_skip(m, "v");
1200 r = sd_bus_message_exit_container(m);
1207 return sd_bus_message_exit_container(m);
1210 #if 0 /// UNNEEDED by elogind
1211 int bus_message_map_properties_changed(
1213 const struct bus_properties_map *map,
1215 sd_bus_error *error,
1219 int r, invalidated, i;
1224 r = bus_message_map_all_properties(m, map, flags, error, userdata);
1228 r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, "s");
1233 while ((r = sd_bus_message_read_basic(m, SD_BUS_TYPE_STRING, &member)) > 0)
1234 for (i = 0; map[i].member; i++)
1235 if (streq(map[i].member, member)) {
1242 r = sd_bus_message_exit_container(m);
1250 int bus_map_all_properties(
1252 const char *destination,
1254 const struct bus_properties_map *map,
1256 sd_bus_error *error,
1257 sd_bus_message **reply,
1260 _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
1264 assert(destination);
1267 assert(reply || (flags & BUS_MAP_STRDUP));
1269 r = sd_bus_call_method(
1273 "org.freedesktop.DBus.Properties",
1281 r = bus_message_map_all_properties(m, map, flags, error, userdata);
1286 *reply = sd_bus_message_ref(m);
1291 int bus_connect_transport(BusTransport transport, const char *host, bool user, sd_bus **ret) {
1292 _cleanup_(sd_bus_unrefp) sd_bus *bus = NULL;
1295 assert(transport >= 0);
1296 assert(transport < _BUS_TRANSPORT_MAX);
1299 assert_return((transport == BUS_TRANSPORT_LOCAL) == !host, -EINVAL);
1300 assert_return(transport == BUS_TRANSPORT_LOCAL || !user, -EOPNOTSUPP);
1302 switch (transport) {
1304 case BUS_TRANSPORT_LOCAL:
1305 #if 0 /// elogind does not support a user bus
1307 r = sd_bus_default_user(&bus);
1310 if (sd_booted() <= 0) {
1311 /* Print a friendly message when the local system is actually not running systemd as PID 1. */
1312 log_error("System has not been booted with elogind as init system (PID 1). Can't operate.");
1316 r = sd_bus_default_system(&bus);
1320 case BUS_TRANSPORT_REMOTE:
1321 r = sd_bus_open_system_remote(&bus, host);
1324 case BUS_TRANSPORT_MACHINE:
1325 r = sd_bus_open_system_machine(&bus, host);
1329 assert_not_reached("Hmm, unknown transport type.");
1334 r = sd_bus_set_exit_on_disconnect(bus, true);
1338 *ret = TAKE_PTR(bus);
1343 #if 0 /// UNNEEDED by elogind
1344 int bus_connect_transport_systemd(BusTransport transport, const char *host, bool user, sd_bus **bus) {
1347 assert(transport >= 0);
1348 assert(transport < _BUS_TRANSPORT_MAX);
1351 assert_return((transport == BUS_TRANSPORT_LOCAL) == !host, -EINVAL);
1352 assert_return(transport == BUS_TRANSPORT_LOCAL || !user, -EOPNOTSUPP);
1354 switch (transport) {
1356 case BUS_TRANSPORT_LOCAL:
1358 r = bus_connect_user_systemd(bus);
1360 if (sd_booted() <= 0) {
1361 /* Print a friendly message when the local system is actually not running systemd as PID 1. */
1362 log_error("System has not been booted with systemd as init system (PID 1). Can't operate.");
1366 r = bus_connect_system_systemd(bus);
1370 case BUS_TRANSPORT_REMOTE:
1371 r = sd_bus_open_system_remote(bus, host);
1374 case BUS_TRANSPORT_MACHINE:
1375 r = sd_bus_open_system_machine(bus, host);
1379 assert_not_reached("Hmm, unknown transport type.");
1386 int bus_property_get_bool(
1389 const char *interface,
1390 const char *property,
1391 sd_bus_message *reply,
1393 sd_bus_error *error) {
1395 int b = *(bool*) userdata;
1397 return sd_bus_message_append_basic(reply, 'b', &b);
1400 int bus_property_set_bool(
1403 const char *interface,
1404 const char *property,
1405 sd_bus_message *value,
1407 sd_bus_error *error) {
1411 r = sd_bus_message_read(value, "b", &b);
1415 *(bool*) userdata = b;
1419 #if 0 /// UNNEEDED by elogind
1420 int bus_property_get_id128(
1423 const char *interface,
1424 const char *property,
1425 sd_bus_message *reply,
1427 sd_bus_error *error) {
1429 sd_id128_t *id = userdata;
1431 if (sd_id128_is_null(*id)) /* Add an empty array if the ID is zero */
1432 return sd_bus_message_append(reply, "ay", 0);
1434 return sd_bus_message_append_array(reply, 'y', id->bytes, 16);
1438 #if __SIZEOF_SIZE_T__ != 8
1439 int bus_property_get_size(
1442 const char *interface,
1443 const char *property,
1444 sd_bus_message *reply,
1446 sd_bus_error *error) {
1448 uint64_t sz = *(size_t*) userdata;
1450 return sd_bus_message_append_basic(reply, 't', &sz);
1454 #if __SIZEOF_LONG__ != 8
1455 int bus_property_get_long(
1458 const char *interface,
1459 const char *property,
1460 sd_bus_message *reply,
1462 sd_bus_error *error) {
1464 int64_t l = *(long*) userdata;
1466 return sd_bus_message_append_basic(reply, 'x', &l);
1469 int bus_property_get_ulong(
1472 const char *interface,
1473 const char *property,
1474 sd_bus_message *reply,
1476 sd_bus_error *error) {
1478 uint64_t ul = *(unsigned long*) userdata;
1480 return sd_bus_message_append_basic(reply, 't', &ul);
1484 int bus_log_parse_error(int r) {
1485 return log_error_errno(r, "Failed to parse bus message: %m");
1488 #if 0 /// UNNEEDED by elogind
1489 int bus_log_create_error(int r) {
1490 return log_error_errno(r, "Failed to create bus message: %m");
1494 #if 0 /// UNNEEDED by elogind
1496 * bus_path_encode_unique() - encode unique object path
1497 * @b: bus connection or NULL
1498 * @prefix: object path prefix
1499 * @sender_id: unique-name of client, or NULL
1500 * @external_id: external ID to be chosen by client, or NULL
1501 * @ret_path: storage for encoded object path pointer
1503 * Whenever we provide a bus API that allows clients to create and manage
1504 * server-side objects, we need to provide a unique name for these objects. If
1505 * we let the server choose the name, we suffer from a race condition: If a
1506 * client creates an object asynchronously, it cannot destroy that object until
1507 * it received the method reply. It cannot know the name of the new object,
1508 * thus, it cannot destroy it. Furthermore, it enforces a round-trip.
1510 * Therefore, many APIs allow the client to choose the unique name for newly
1511 * created objects. There're two problems to solve, though:
1512 * 1) Object names are usually defined via dbus object paths, which are
1513 * usually globally namespaced. Therefore, multiple clients must be able
1514 * to choose unique object names without interference.
1515 * 2) If multiple libraries share the same bus connection, they must be
1516 * able to choose unique object names without interference.
1517 * The first problem is solved easily by prefixing a name with the
1518 * unique-bus-name of a connection. The server side must enforce this and
1519 * reject any other name. The second problem is solved by providing unique
1520 * suffixes from within sd-bus.
1522 * This helper allows clients to create unique object-paths. It uses the
1523 * template '/prefix/sender_id/external_id' and returns the new path in
1524 * @ret_path (must be freed by the caller).
1525 * If @sender_id is NULL, the unique-name of @b is used. If @external_id is
1526 * NULL, this function allocates a unique suffix via @b (by requesting a new
1527 * cookie). If both @sender_id and @external_id are given, @b can be passed as
1530 * Returns: 0 on success, negative error code on failure.
1532 int bus_path_encode_unique(sd_bus *b, const char *prefix, const char *sender_id, const char *external_id, char **ret_path) {
1533 _cleanup_free_ char *sender_label = NULL, *external_label = NULL;
1534 char external_buf[DECIMAL_STR_MAX(uint64_t)], *p;
1537 assert_return(b || (sender_id && external_id), -EINVAL);
1538 assert_return(object_path_is_valid(prefix), -EINVAL);
1539 assert_return(ret_path, -EINVAL);
1542 r = sd_bus_get_unique_name(b, &sender_id);
1548 xsprintf(external_buf, "%"PRIu64, ++b->cookie);
1549 external_id = external_buf;
1552 sender_label = bus_label_escape(sender_id);
1556 external_label = bus_label_escape(external_id);
1557 if (!external_label)
1560 p = strjoin(prefix, "/", sender_label, "/", external_label);
1569 * bus_path_decode_unique() - decode unique object path
1570 * @path: object path to decode
1571 * @prefix: object path prefix
1572 * @ret_sender: output parameter for sender-id label
1573 * @ret_external: output parameter for external-id label
1575 * This does the reverse of bus_path_encode_unique() (see its description for
1576 * details). Both trailing labels, sender-id and external-id, are unescaped and
1577 * returned in the given output parameters (the caller must free them).
1579 * Note that this function returns 0 if the path does not match the template
1580 * (see bus_path_encode_unique()), 1 if it matched.
1582 * Returns: Negative error code on failure, 0 if the given object path does not
1583 * match the template (return parameters are set to NULL), 1 if it was
1584 * parsed successfully (return parameters contain allocated labels).
1586 int bus_path_decode_unique(const char *path, const char *prefix, char **ret_sender, char **ret_external) {
1588 char *sender, *external;
1590 assert(object_path_is_valid(path));
1591 assert(object_path_is_valid(prefix));
1593 assert(ret_external);
1595 p = object_path_startswith(path, prefix);
1598 *ret_external = NULL;
1605 *ret_external = NULL;
1609 sender = bus_label_unescape_n(p, q - p);
1610 external = bus_label_unescape(q + 1);
1611 if (!sender || !external) {
1617 *ret_sender = sender;
1618 *ret_external = external;
1623 #if 0 /// UNNEEDED by elogind
1624 int bus_property_get_rlimit(
1627 const char *interface,
1628 const char *property,
1629 sd_bus_message *reply,
1631 sd_bus_error *error) {
1633 const char *is_soft;
1642 is_soft = endswith(property, "Soft");
1644 rl = *(struct rlimit**) userdata;
1646 x = is_soft ? rl->rlim_cur : rl->rlim_max;
1648 struct rlimit buf = {};
1652 /* Chop off "Soft" suffix */
1653 s = is_soft ? strndupa(property, is_soft - property) : property;
1655 /* Skip over any prefix, such as "Default" */
1656 assert_se(p = strstr(s, "Limit"));
1658 z = rlimit_from_string(p + 5);
1661 (void) getrlimit(z, &buf);
1662 x = is_soft ? buf.rlim_cur : buf.rlim_max;
1665 /* rlim_t might have different sizes, let's map RLIMIT_INFINITY to (uint64_t) -1, so that it is the same on all
1667 u = x == RLIM_INFINITY ? (uint64_t) -1 : (uint64_t) x;
1669 return sd_bus_message_append(reply, "t", u);
1672 int bus_track_add_name_many(sd_bus_track *t, char **l) {
1678 /* Continues adding after failure, and returns the first failure. */
1680 STRV_FOREACH(i, l) {
1683 k = sd_bus_track_add_name(t, *i);
1684 if (k < 0 && r >= 0)
1692 int bus_open_system_watch_bind_with_description(sd_bus **ret, const char *description) {
1693 _cleanup_(sd_bus_unrefp) sd_bus *bus = NULL;
1699 /* Match like sd_bus_open_system(), but with the "watch_bind" feature and the Connected() signal turned on. */
1701 r = sd_bus_new(&bus);
1706 r = sd_bus_set_description(bus, description);
1711 e = secure_getenv("DBUS_SYSTEM_BUS_ADDRESS");
1713 e = DEFAULT_SYSTEM_BUS_ADDRESS;
1715 r = sd_bus_set_address(bus, e);
1719 r = sd_bus_set_bus_client(bus, true);
1723 r = sd_bus_set_trusted(bus, true);
1727 r = sd_bus_negotiate_creds(bus, true, SD_BUS_CREDS_UID|SD_BUS_CREDS_EUID|SD_BUS_CREDS_EFFECTIVE_CAPS);
1731 r = sd_bus_set_watch_bind(bus, true);
1735 r = sd_bus_set_connected_signal(bus, true);
1739 r = sd_bus_start(bus);
1743 *ret = TAKE_PTR(bus);
1748 struct request_name_data {
1756 static void request_name_destroy_callback(void *userdata) {
1757 struct request_name_data *data = userdata;
1760 assert(data->n_ref > 0);
1762 log_info("%s n_ref=%u", __func__, data->n_ref);
1765 if (data->n_ref == 0)
1769 static int reload_dbus_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
1770 struct request_name_data *data = userdata;
1771 const sd_bus_error *e;
1776 assert(data->n_ref > 0);
1778 e = sd_bus_message_get_error(m);
1780 log_error_errno(sd_bus_error_get_errno(e), "Failed to reload DBus configuration: %s", e->message);
1784 /* Here, use the default request name handler to avoid an infinite loop of reloading and requesting. */
1785 r = sd_bus_request_name_async(sd_bus_message_get_bus(m), NULL, data->name, data->flags, NULL, data->userdata);
1787 log_error_errno(r, "Failed to request name: %m");
1792 static int request_name_handler_may_reload_dbus(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
1793 struct request_name_data *data = userdata;
1800 if (sd_bus_message_is_method_error(m, NULL)) {
1801 const sd_bus_error *e = sd_bus_message_get_error(m);
1802 _cleanup_(sd_bus_slot_unrefp) sd_bus_slot *slot = NULL;
1804 if (!sd_bus_error_has_name(e, SD_BUS_ERROR_ACCESS_DENIED)) {
1805 log_debug_errno(sd_bus_error_get_errno(e),
1806 "Unable to request name, failing connection: %s",
1809 bus_enter_closing(sd_bus_message_get_bus(m));
1813 log_debug_errno(sd_bus_error_get_errno(e),
1814 "Unable to request name, will retry after reloading DBus configuration: %s",
1817 /* If systemd-timesyncd.service enables DynamicUser= and dbus.service
1818 * started before the dynamic user is realized, then the DBus policy
1819 * about timesyncd has not been enabled yet. So, let's try to reload
1820 * DBus configuration, and after that request the name again. Note that it
1821 * seems that no privileges are necessary to call the following method. */
1823 r = sd_bus_call_method_async(
1824 sd_bus_message_get_bus(m),
1826 "org.freedesktop.DBus",
1827 "/org/freedesktop/DBus",
1828 "org.freedesktop.DBus",
1830 reload_dbus_handler,
1833 log_error_errno(r, "Failed to reload DBus configuration: %m");
1834 bus_enter_closing(sd_bus_message_get_bus(m));
1839 assert_se(sd_bus_slot_set_destroy_callback(slot, request_name_destroy_callback) >= 0);
1841 r = sd_bus_slot_set_floating(slot, true);
1848 r = sd_bus_message_read(m, "u", &ret);
1854 case BUS_NAME_ALREADY_OWNER:
1855 log_debug("Already owner of requested service name, ignoring.");
1858 case BUS_NAME_IN_QUEUE:
1859 log_debug("In queue for requested service name.");
1862 case BUS_NAME_PRIMARY_OWNER:
1863 log_debug("Successfully acquired requested service name.");
1866 case BUS_NAME_EXISTS:
1867 log_debug("Requested service name already owned, failing connection.");
1868 bus_enter_closing(sd_bus_message_get_bus(m));
1872 log_debug("Unexpected response from RequestName(), failing connection.");
1873 bus_enter_closing(sd_bus_message_get_bus(m));
1877 int bus_request_name_async_may_reload_dbus(sd_bus *bus, sd_bus_slot **ret_slot, const char *name, uint64_t flags, void *userdata) {
1878 _cleanup_free_ struct request_name_data *data = NULL;
1879 _cleanup_(sd_bus_slot_unrefp) sd_bus_slot *slot = NULL;
1882 data = new(struct request_name_data, 1);
1886 *data = (struct request_name_data) {
1890 .userdata = userdata,
1893 r = sd_bus_request_name_async(bus, &slot, name, flags, request_name_handler_may_reload_dbus, data);
1897 assert_se(sd_bus_slot_set_destroy_callback(slot, request_name_destroy_callback) >= 0);
1901 *ret_slot = TAKE_PTR(slot);
1903 r = sd_bus_slot_set_floating(slot, true);
1911 int bus_reply_pair_array(sd_bus_message *m, char **l) {
1912 _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
1918 /* Reply to the specified message with a message containing a dictionary put together from the specified
1921 r = sd_bus_message_new_method_return(m, &reply);
1925 r = sd_bus_message_open_container(reply, 'a', "{ss}");
1929 STRV_FOREACH_PAIR(k, v, l) {
1930 r = sd_bus_message_append(reply, "{ss}", *k, *v);
1935 r = sd_bus_message_close_container(reply);
1939 return sd_bus_send(NULL, reply, NULL);