1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2013 Lennart Poettering
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.
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.
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/>.
22 #ifdef HAVE_VALGRIND_MEMCHECK_H
23 #include <valgrind/memcheck.h>
31 #include "bus-internal.h"
32 #include "bus-message.h"
33 #include "bus-control.h"
34 #include "bus-bloom.h"
36 #include "cgroup-util.h"
38 _public_ int sd_bus_get_unique_name(sd_bus *bus, const char **unique) {
41 assert_return(bus, -EINVAL);
42 assert_return(unique, -EINVAL);
43 assert_return(!bus_pid_changed(bus), -ECHILD);
45 r = bus_ensure_running(bus);
49 *unique = bus->unique_name;
53 static int bus_request_name_kernel(sd_bus *bus, const char *name, uint64_t flags) {
54 struct kdbus_cmd_name *n;
62 size = offsetof(struct kdbus_cmd_name, items) + KDBUS_ITEM_SIZE(l);
63 n = alloca0_align(size, 8);
65 kdbus_translate_request_name_flags(flags, (uint64_t *) &n->flags);
67 n->items[0].size = KDBUS_ITEM_HEADER_SIZE + l;
68 n->items[0].type = KDBUS_ITEM_NAME;
69 memcpy(n->items[0].str, name, l);
71 #ifdef HAVE_VALGRIND_MEMCHECK_H
72 VALGRIND_MAKE_MEM_DEFINED(n, n->size);
75 r = ioctl(bus->input_fd, KDBUS_CMD_NAME_ACQUIRE, n);
79 if (n->flags & KDBUS_NAME_IN_QUEUE)
85 static int bus_request_name_dbus1(sd_bus *bus, const char *name, uint64_t flags) {
86 _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
87 uint32_t ret, param = 0;
93 if (flags & SD_BUS_NAME_ALLOW_REPLACEMENT)
94 param |= BUS_NAME_ALLOW_REPLACEMENT;
95 if (flags & SD_BUS_NAME_REPLACE_EXISTING)
96 param |= BUS_NAME_REPLACE_EXISTING;
97 if (!(flags & SD_BUS_NAME_QUEUE))
98 param |= BUS_NAME_DO_NOT_QUEUE;
100 r = sd_bus_call_method(
102 "org.freedesktop.DBus",
103 "/org/freedesktop/DBus",
104 "org.freedesktop.DBus",
114 r = sd_bus_message_read(reply, "u", &ret);
118 if (ret == BUS_NAME_ALREADY_OWNER)
120 else if (ret == BUS_NAME_EXISTS)
122 else if (ret == BUS_NAME_IN_QUEUE)
124 else if (ret == BUS_NAME_PRIMARY_OWNER)
130 _public_ int sd_bus_request_name(sd_bus *bus, const char *name, uint64_t flags) {
131 assert_return(bus, -EINVAL);
132 assert_return(name, -EINVAL);
133 assert_return(bus->bus_client, -EINVAL);
134 assert_return(!bus_pid_changed(bus), -ECHILD);
135 assert_return(!(flags & ~(SD_BUS_NAME_ALLOW_REPLACEMENT|SD_BUS_NAME_REPLACE_EXISTING|SD_BUS_NAME_QUEUE)), -EINVAL);
136 assert_return(service_name_is_valid(name), -EINVAL);
137 assert_return(name[0] != ':', -EINVAL);
139 if (!BUS_IS_OPEN(bus->state))
143 return bus_request_name_kernel(bus, name, flags);
145 return bus_request_name_dbus1(bus, name, flags);
148 static int bus_release_name_kernel(sd_bus *bus, const char *name) {
149 struct kdbus_cmd_name *n;
156 l = strlen(name) + 1;
157 size = offsetof(struct kdbus_cmd_name, items) + KDBUS_ITEM_SIZE(l);
158 n = alloca0_align(size, 8);
161 n->items[0].size = KDBUS_ITEM_HEADER_SIZE + l;
162 n->items[0].type = KDBUS_ITEM_NAME;
163 memcpy(n->items[0].str, name, l);
165 #ifdef HAVE_VALGRIND_MEMCHECK_H
166 VALGRIND_MAKE_MEM_DEFINED(n, n->size);
168 r = ioctl(bus->input_fd, KDBUS_CMD_NAME_RELEASE, n);
175 static int bus_release_name_dbus1(sd_bus *bus, const char *name) {
176 _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
183 r = sd_bus_call_method(
185 "org.freedesktop.DBus",
186 "/org/freedesktop/DBus",
187 "org.freedesktop.DBus",
196 r = sd_bus_message_read(reply, "u", &ret);
199 if (ret == BUS_NAME_NON_EXISTENT)
201 if (ret == BUS_NAME_NOT_OWNER)
203 if (ret == BUS_NAME_RELEASED)
209 _public_ int sd_bus_release_name(sd_bus *bus, const char *name) {
210 assert_return(bus, -EINVAL);
211 assert_return(name, -EINVAL);
212 assert_return(bus->bus_client, -EINVAL);
213 assert_return(!bus_pid_changed(bus), -ECHILD);
214 assert_return(service_name_is_valid(name), -EINVAL);
215 assert_return(name[0] != ':', -EINVAL);
217 if (!BUS_IS_OPEN(bus->state))
221 return bus_release_name_kernel(bus, name);
223 return bus_release_name_dbus1(bus, name);
226 static int kernel_cmd_free(sd_bus *bus, uint64_t offset)
228 struct kdbus_cmd_free cmd;
236 r = ioctl(bus->input_fd, KDBUS_CMD_FREE, &cmd);
243 static int kernel_get_list(sd_bus *bus, uint64_t flags, char ***x) {
244 struct kdbus_cmd_name_list cmd = {};
245 struct kdbus_name_list *name_list;
246 struct kdbus_name_info *name;
247 uint64_t previous_id = 0;
250 /* Caller will free half-constructed list on failure... */
254 r = ioctl(bus->input_fd, KDBUS_CMD_NAME_LIST, &cmd);
258 name_list = (struct kdbus_name_list *) ((uint8_t *) bus->kdbus_buffer + cmd.offset);
260 KDBUS_ITEM_FOREACH(name, name_list, names) {
262 struct kdbus_item *item;
263 const char *entry_name = NULL;
265 if ((flags & KDBUS_NAME_LIST_UNIQUE) && name->owner_id != previous_id) {
268 if (asprintf(&n, ":1.%llu", (unsigned long long) name->owner_id) < 0) {
273 r = strv_consume(x, n);
277 previous_id = name->owner_id;
280 KDBUS_ITEM_FOREACH(item, name, items)
281 if (item->type == KDBUS_ITEM_OWNED_NAME)
282 entry_name = item->name.name;
284 if (entry_name && service_name_is_valid(entry_name)) {
285 r = strv_extend(x, entry_name);
296 kernel_cmd_free(bus, cmd.offset);
300 static int bus_list_names_kernel(sd_bus *bus, char ***acquired, char ***activatable) {
301 _cleanup_strv_free_ char **x = NULL, **y = NULL;
305 r = kernel_get_list(bus, KDBUS_NAME_LIST_UNIQUE | KDBUS_NAME_LIST_NAMES, &x);
311 r = kernel_get_list(bus, KDBUS_NAME_LIST_ACTIVATORS, &y);
327 static int bus_list_names_dbus1(sd_bus *bus, char ***acquired, char ***activatable) {
328 _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
329 _cleanup_strv_free_ char **x = NULL, **y = NULL;
333 r = sd_bus_call_method(
335 "org.freedesktop.DBus",
336 "/org/freedesktop/DBus",
337 "org.freedesktop.DBus",
345 r = sd_bus_message_read_strv(reply, &x);
349 reply = sd_bus_message_unref(reply);
353 r = sd_bus_call_method(
355 "org.freedesktop.DBus",
356 "/org/freedesktop/DBus",
357 "org.freedesktop.DBus",
358 "ListActivatableNames",
365 r = sd_bus_message_read_strv(reply, &y);
381 _public_ int sd_bus_list_names(sd_bus *bus, char ***acquired, char ***activatable) {
382 assert_return(bus, -EINVAL);
383 assert_return(acquired || activatable, -EINVAL);
384 assert_return(!bus_pid_changed(bus), -ECHILD);
386 if (!BUS_IS_OPEN(bus->state))
390 return bus_list_names_kernel(bus, acquired, activatable);
392 return bus_list_names_dbus1(bus, acquired, activatable);
395 static int bus_populate_creds_from_items(sd_bus *bus,
396 struct kdbus_info *info,
400 struct kdbus_item *item;
404 KDBUS_ITEM_FOREACH(item, info, items) {
406 switch (item->type) {
408 case KDBUS_ITEM_CREDS:
409 m = (SD_BUS_CREDS_UID | SD_BUS_CREDS_GID | SD_BUS_CREDS_PID) & mask;
412 c->uid = (uid_t) item->creds.uid;
413 c->pid = (pid_t) item->creds.pid;
414 c->gid = (gid_t) item->creds.gid;
418 if (mask & SD_BUS_CREDS_TID && item->creds.tid > 0) {
419 c->tid = (pid_t) item->creds.tid;
420 c->mask |= SD_BUS_CREDS_TID;
423 if (mask & SD_BUS_CREDS_PID_STARTTIME && item->creds.starttime > 0) {
424 c->pid_starttime = item->creds.starttime;
425 c->mask |= SD_BUS_CREDS_PID_STARTTIME;
430 case KDBUS_ITEM_PID_COMM:
431 if (mask & SD_BUS_CREDS_COMM) {
432 c->comm = strdup(item->str);
436 c->mask |= SD_BUS_CREDS_COMM;
440 case KDBUS_ITEM_TID_COMM:
441 if (mask & SD_BUS_CREDS_TID_COMM) {
442 c->tid_comm = strdup(item->str);
446 c->mask |= SD_BUS_CREDS_TID_COMM;
451 if (mask & SD_BUS_CREDS_EXE) {
452 c->exe = strdup(item->str);
456 c->mask |= SD_BUS_CREDS_EXE;
460 case KDBUS_ITEM_CMDLINE:
461 if (mask & SD_BUS_CREDS_CMDLINE) {
462 c->cmdline_size = item->size - KDBUS_ITEM_HEADER_SIZE;
463 c->cmdline = memdup(item->data, c->cmdline_size);
467 c->mask |= SD_BUS_CREDS_CMDLINE;
471 case KDBUS_ITEM_CGROUP:
472 m = (SD_BUS_CREDS_CGROUP | SD_BUS_CREDS_UNIT |
473 SD_BUS_CREDS_USER_UNIT | SD_BUS_CREDS_SLICE |
474 SD_BUS_CREDS_SESSION | SD_BUS_CREDS_OWNER_UID) & mask;
477 c->cgroup = strdup(item->str);
481 r = bus_get_root_path(bus);
485 c->cgroup_root = strdup(bus->cgroup_root);
493 case KDBUS_ITEM_CAPS:
494 m = (SD_BUS_CREDS_EFFECTIVE_CAPS | SD_BUS_CREDS_PERMITTED_CAPS |
495 SD_BUS_CREDS_INHERITABLE_CAPS | SD_BUS_CREDS_BOUNDING_CAPS) & mask;
498 c->capability_size = item->size - offsetof(struct kdbus_item, caps.caps);
499 c->capability = memdup(item->caps.caps, c->capability_size);
507 case KDBUS_ITEM_SECLABEL:
508 if (mask & SD_BUS_CREDS_SELINUX_CONTEXT) {
509 c->label = strdup(item->str);
513 c->mask |= SD_BUS_CREDS_SELINUX_CONTEXT;
517 case KDBUS_ITEM_AUDIT:
518 m = (SD_BUS_CREDS_AUDIT_SESSION_ID | SD_BUS_CREDS_AUDIT_LOGIN_UID) & mask;
521 c->audit_session_id = item->audit.sessionid;
522 c->audit_login_uid = item->audit.loginuid;
527 case KDBUS_ITEM_OWNED_NAME:
528 if ((mask & SD_BUS_CREDS_WELL_KNOWN_NAMES) && service_name_is_valid(item->name.name)) {
529 r = strv_extend(&c->well_known_names, item->name.name);
533 c->mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES;
537 case KDBUS_ITEM_CONN_DESCRIPTION:
538 if ((mask & SD_BUS_CREDS_DESCRIPTION)) {
539 c->description = strdup(item->str);
543 c->mask |= SD_BUS_CREDS_DESCRIPTION;
552 static int bus_get_name_creds_kdbus(
556 sd_bus_creds **creds) {
558 _cleanup_bus_creds_unref_ sd_bus_creds *c = NULL;
559 struct kdbus_cmd_info *cmd;
560 struct kdbus_info *conn_info;
565 r = bus_kernel_parse_unique_name(name, &id);
569 size = offsetof(struct kdbus_cmd_info, items);
570 cmd = alloca0_align(size, 8);
573 l = strlen(name) + 1;
574 size = offsetof(struct kdbus_cmd_info, items) + KDBUS_ITEM_SIZE(l);
575 cmd = alloca0_align(size, 8);
576 cmd->items[0].size = KDBUS_ITEM_HEADER_SIZE + l;
577 cmd->items[0].type = KDBUS_ITEM_NAME;
578 memcpy(cmd->items[0].str, name, l);
582 kdbus_translate_attach_flags(mask, (uint64_t*) &cmd->flags);
584 r = ioctl(bus->input_fd, KDBUS_CMD_CONN_INFO, cmd);
588 conn_info = (struct kdbus_info *) ((uint8_t *) bus->kdbus_buffer + cmd->offset);
590 /* Non-activated names are considered not available */
591 if (conn_info->flags & KDBUS_HELLO_ACTIVATOR) {
605 if (mask & SD_BUS_CREDS_UNIQUE_NAME) {
606 if (asprintf(&c->unique_name, ":1.%llu", (unsigned long long) conn_info->id) < 0) {
611 c->mask |= SD_BUS_CREDS_UNIQUE_NAME;
614 r = bus_populate_creds_from_items(bus, conn_info, mask, c);
626 kernel_cmd_free(bus, cmd->offset);
630 static int bus_get_name_creds_dbus1(
634 sd_bus_creds **creds) {
636 _cleanup_bus_message_unref_ sd_bus_message *reply_unique = NULL, *reply = NULL;
637 _cleanup_bus_creds_unref_ sd_bus_creds *c = NULL;
638 const char *unique = NULL;
642 /* Only query the owner if the caller wants to know it or if
643 * the caller just wants to check whether a name exists */
644 if ((mask & SD_BUS_CREDS_UNIQUE_NAME) || mask == 0) {
645 r = sd_bus_call_method(
647 "org.freedesktop.DBus",
648 "/org/freedesktop/DBus",
649 "org.freedesktop.DBus",
658 r = sd_bus_message_read(reply_unique, "s", &unique);
668 if ((mask & SD_BUS_CREDS_UNIQUE_NAME) && unique) {
669 c->unique_name = strdup(unique);
673 c->mask |= SD_BUS_CREDS_UNIQUE_NAME;
676 if (mask & (SD_BUS_CREDS_PID|SD_BUS_CREDS_PID_STARTTIME|SD_BUS_CREDS_GID|
677 SD_BUS_CREDS_COMM|SD_BUS_CREDS_EXE|SD_BUS_CREDS_CMDLINE|
678 SD_BUS_CREDS_CGROUP|SD_BUS_CREDS_UNIT|SD_BUS_CREDS_USER_UNIT|SD_BUS_CREDS_SLICE|SD_BUS_CREDS_SESSION|SD_BUS_CREDS_OWNER_UID|
679 SD_BUS_CREDS_EFFECTIVE_CAPS|SD_BUS_CREDS_PERMITTED_CAPS|SD_BUS_CREDS_INHERITABLE_CAPS|SD_BUS_CREDS_BOUNDING_CAPS|
680 SD_BUS_CREDS_AUDIT_SESSION_ID|SD_BUS_CREDS_AUDIT_LOGIN_UID)) {
683 r = sd_bus_call_method(
685 "org.freedesktop.DBus",
686 "/org/freedesktop/DBus",
687 "org.freedesktop.DBus",
688 "GetConnectionUnixProcessID",
692 unique ? unique : name);
696 r = sd_bus_message_read(reply, "u", &u);
701 if (mask & SD_BUS_CREDS_PID) {
703 c->mask |= SD_BUS_CREDS_PID;
706 reply = sd_bus_message_unref(reply);
709 if (mask & SD_BUS_CREDS_UID) {
712 r = sd_bus_call_method(
714 "org.freedesktop.DBus",
715 "/org/freedesktop/DBus",
716 "org.freedesktop.DBus",
717 "GetConnectionUnixUser",
721 unique ? unique : name);
725 r = sd_bus_message_read(reply, "u", &u);
730 c->mask |= SD_BUS_CREDS_UID;
732 reply = sd_bus_message_unref(reply);
735 if (mask & SD_BUS_CREDS_SELINUX_CONTEXT) {
736 const void *p = NULL;
739 r = sd_bus_call_method(
741 "org.freedesktop.DBus",
742 "/org/freedesktop/DBus",
743 "org.freedesktop.DBus",
744 "GetConnectionSELinuxSecurityContext",
748 unique ? unique : name);
752 r = sd_bus_message_read_array(reply, 'y', &p, &sz);
756 c->label = strndup(p, sz);
760 c->mask |= SD_BUS_CREDS_SELINUX_CONTEXT;
763 r = bus_creds_add_more(c, mask, pid, 0);
776 _public_ int sd_bus_get_name_creds(
780 sd_bus_creds **creds) {
782 assert_return(bus, -EINVAL);
783 assert_return(name, -EINVAL);
784 assert_return(mask <= _SD_BUS_CREDS_ALL, -ENOTSUP);
785 assert_return(mask == 0 || creds, -EINVAL);
786 assert_return(!bus_pid_changed(bus), -ECHILD);
787 assert_return(service_name_is_valid(name), -EINVAL);
788 assert_return(bus->bus_client, -ENODATA);
790 if (!BUS_IS_OPEN(bus->state))
794 return bus_get_name_creds_kdbus(bus, name, mask, creds);
796 return bus_get_name_creds_dbus1(bus, name, mask, creds);
799 _public_ int sd_bus_get_owner_creds(sd_bus *bus, uint64_t mask, sd_bus_creds **ret) {
800 _cleanup_bus_creds_unref_ sd_bus_creds *c = NULL;
804 assert_return(bus, -EINVAL);
805 assert_return(mask <= _SD_BUS_CREDS_ALL, -ENOTSUP);
806 assert_return(ret, -EINVAL);
807 assert_return(!bus_pid_changed(bus), -ECHILD);
809 if (!BUS_IS_OPEN(bus->state))
812 if (!bus->ucred_valid && !isempty(bus->label))
819 if (bus->ucred_valid) {
820 pid = c->pid = bus->ucred.pid;
821 c->uid = bus->ucred.uid;
822 c->gid = bus->ucred.gid;
824 c->mask |= (SD_BUS_CREDS_UID | SD_BUS_CREDS_PID | SD_BUS_CREDS_GID) & mask;
827 if (!isempty(bus->label) && (mask & SD_BUS_CREDS_SELINUX_CONTEXT)) {
828 c->label = strdup(bus->label);
832 c->mask |= SD_BUS_CREDS_SELINUX_CONTEXT;
835 if (bus->is_kernel) {
836 struct kdbus_cmd_info cmd = {};
837 struct kdbus_info *creator_info;
839 cmd.size = sizeof(cmd);
840 r = ioctl(bus->input_fd, KDBUS_CMD_BUS_CREATOR_INFO, &cmd);
844 creator_info = (struct kdbus_info *) ((uint8_t *) bus->kdbus_buffer + cmd.offset);
846 r = bus_populate_creds_from_items(bus, creator_info, mask, c);
847 kernel_cmd_free(bus, cmd.offset);
852 r = bus_creds_add_more(c, mask, pid, 0);
862 static int add_name_change_match(sd_bus *bus,
865 const char *old_owner,
866 const char *new_owner) {
868 uint64_t name_id = KDBUS_MATCH_ID_ANY, old_owner_id = 0, new_owner_id = 0;
869 int is_name_id = -1, r;
870 struct kdbus_item *item;
874 /* If we encounter a match that could match against
875 * NameOwnerChanged messages, then we need to create
876 * KDBUS_ITEM_NAME_{ADD,REMOVE,CHANGE} and
877 * KDBUS_ITEM_ID_{ADD,REMOVE} matches for it, possibly
878 * multiple if the match is underspecified.
880 * The NameOwnerChanged signals take three parameters with
881 * unique or well-known names, but only some forms actually
884 * WELLKNOWN, "", UNIQUE → KDBUS_ITEM_NAME_ADD
885 * WELLKNOWN, UNIQUE, "" → KDBUS_ITEM_NAME_REMOVE
886 * WELLKNOWN, UNIQUE, UNIQUE → KDBUS_ITEM_NAME_CHANGE
887 * UNIQUE, "", UNIQUE → KDBUS_ITEM_ID_ADD
888 * UNIQUE, UNIQUE, "" → KDBUS_ITEM_ID_REMOVE
890 * For the latter two the two unique names must be identical.
895 is_name_id = bus_kernel_parse_unique_name(name, &name_id);
900 if (!isempty(old_owner)) {
901 r = bus_kernel_parse_unique_name(old_owner, &old_owner_id);
906 if (is_name_id > 0 && old_owner_id != name_id)
909 old_owner_id = KDBUS_MATCH_ID_ANY;
911 if (!isempty(new_owner)) {
912 r = bus_kernel_parse_unique_name(new_owner, &new_owner_id);
917 if (is_name_id > 0 && new_owner_id != name_id)
920 new_owner_id = KDBUS_MATCH_ID_ANY;
922 if (is_name_id <= 0) {
923 struct kdbus_cmd_match *m;
926 /* If the name argument is missing or is a well-known
927 * name, then add KDBUS_ITEM_NAME_{ADD,REMOVE,CHANGE}
930 l = name ? strlen(name) + 1 : 0;
932 sz = ALIGN8(offsetof(struct kdbus_cmd_match, items) +
933 offsetof(struct kdbus_item, name_change) +
934 offsetof(struct kdbus_notify_name_change, name) +
937 m = alloca0_align(sz, 8);
943 offsetof(struct kdbus_item, name_change) +
944 offsetof(struct kdbus_notify_name_change, name) +
947 item->name_change.old_id.id = old_owner_id;
948 item->name_change.new_id.id = new_owner_id;
951 memcpy(item->name_change.name, name, l);
953 /* If the old name is unset or empty, then
954 * this can match against added names */
955 if (!old_owner || old_owner[0] == 0) {
956 item->type = KDBUS_ITEM_NAME_ADD;
958 r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_ADD, m);
963 /* If the new name is unset or empty, then
964 * this can match against removed names */
965 if (!new_owner || new_owner[0] == 0) {
966 item->type = KDBUS_ITEM_NAME_REMOVE;
968 r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_ADD, m);
973 /* The CHANGE match we need in either case, because
974 * what is reported as a name change by the kernel
975 * might just be an owner change between starter and
976 * normal clients. For userspace such a change should
977 * be considered a removal/addition, hence let's
978 * subscribe to this unconditionally. */
979 item->type = KDBUS_ITEM_NAME_CHANGE;
980 r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_ADD, m);
985 if (is_name_id != 0) {
986 struct kdbus_cmd_match *m;
989 /* If the name argument is missing or is a unique
990 * name, then add KDBUS_ITEM_ID_{ADD,REMOVE} matches
993 sz = ALIGN8(offsetof(struct kdbus_cmd_match, items) +
994 offsetof(struct kdbus_item, id_change) +
995 sizeof(struct kdbus_notify_id_change));
997 m = alloca0_align(sz, 8);
1003 offsetof(struct kdbus_item, id_change) +
1004 sizeof(struct kdbus_notify_id_change);
1005 item->id_change.id = name_id;
1007 /* If the old name is unset or empty, then this can
1008 * match against added ids */
1009 if (!old_owner || old_owner[0] == 0) {
1010 item->type = KDBUS_ITEM_ID_ADD;
1012 r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_ADD, m);
1017 /* If thew new name is unset or empty, then this can
1018 * match against removed ids */
1019 if (!new_owner || new_owner[0] == 0) {
1020 item->type = KDBUS_ITEM_ID_REMOVE;
1022 r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_ADD, m);
1031 int bus_add_match_internal_kernel(
1033 struct bus_match_component *components,
1034 unsigned n_components,
1037 struct kdbus_cmd_match *m;
1038 struct kdbus_item *item;
1041 const char *sender = NULL;
1042 size_t sender_length = 0;
1043 uint64_t src_id = KDBUS_MATCH_ID_ANY;
1044 bool using_bloom = false;
1046 bool matches_name_change = true;
1047 const char *name_change_arg[3] = {};
1052 bloom = alloca0(bus->bloom_size);
1054 sz = ALIGN8(offsetof(struct kdbus_cmd_match, items));
1056 for (i = 0; i < n_components; i++) {
1057 struct bus_match_component *c = &components[i];
1061 case BUS_MATCH_SENDER:
1062 if (!streq(c->value_str, "org.freedesktop.DBus"))
1063 matches_name_change = false;
1065 r = bus_kernel_parse_unique_name(c->value_str, &src_id);
1069 sz += ALIGN8(offsetof(struct kdbus_item, id) + sizeof(uint64_t));
1071 sender = c->value_str;
1072 sender_length = strlen(sender);
1073 sz += ALIGN8(offsetof(struct kdbus_item, str) + sender_length + 1);
1078 case BUS_MATCH_MESSAGE_TYPE:
1079 if (c->value_u8 != SD_BUS_MESSAGE_SIGNAL)
1080 matches_name_change = false;
1082 bloom_add_pair(bloom, bus->bloom_size, bus->bloom_n_hash, "message-type", bus_message_type_to_string(c->value_u8));
1086 case BUS_MATCH_INTERFACE:
1087 if (!streq(c->value_str, "org.freedesktop.DBus"))
1088 matches_name_change = false;
1090 bloom_add_pair(bloom, bus->bloom_size, bus->bloom_n_hash, "interface", c->value_str);
1094 case BUS_MATCH_MEMBER:
1095 if (!streq(c->value_str, "NameOwnerChanged"))
1096 matches_name_change = false;
1098 bloom_add_pair(bloom, bus->bloom_size, bus->bloom_n_hash, "member", c->value_str);
1102 case BUS_MATCH_PATH:
1103 if (!streq(c->value_str, "/org/freedesktop/DBus"))
1104 matches_name_change = false;
1106 bloom_add_pair(bloom, bus->bloom_size, bus->bloom_n_hash, "path", c->value_str);
1110 case BUS_MATCH_PATH_NAMESPACE:
1111 if (!streq(c->value_str, "/")) {
1112 bloom_add_pair(bloom, bus->bloom_size, bus->bloom_n_hash, "path-slash-prefix", c->value_str);
1117 case BUS_MATCH_ARG...BUS_MATCH_ARG_LAST: {
1118 char buf[sizeof("arg")-1 + 2 + 1];
1120 if (c->type - BUS_MATCH_ARG < 3)
1121 name_change_arg[c->type - BUS_MATCH_ARG] = c->value_str;
1123 snprintf(buf, sizeof(buf), "arg%u", c->type - BUS_MATCH_ARG);
1124 bloom_add_pair(bloom, bus->bloom_size, bus->bloom_n_hash, buf, c->value_str);
1129 case BUS_MATCH_ARG_PATH...BUS_MATCH_ARG_PATH_LAST: {
1130 char buf[sizeof("arg")-1 + 2 + sizeof("-slash-prefix")];
1132 snprintf(buf, sizeof(buf), "arg%u-slash-prefix", c->type - BUS_MATCH_ARG_PATH);
1133 bloom_add_pair(bloom, bus->bloom_size, bus->bloom_n_hash, buf, c->value_str);
1138 case BUS_MATCH_ARG_NAMESPACE...BUS_MATCH_ARG_NAMESPACE_LAST: {
1139 char buf[sizeof("arg")-1 + 2 + sizeof("-dot-prefix")];
1141 snprintf(buf, sizeof(buf), "arg%u-dot-prefix", c->type - BUS_MATCH_ARG_NAMESPACE);
1142 bloom_add_pair(bloom, bus->bloom_size, bus->bloom_n_hash, buf, c->value_str);
1147 case BUS_MATCH_DESTINATION:
1148 /* The bloom filter does not include
1149 the destination, since it is only
1150 available for broadcast messages
1151 which do not carry a destination
1152 since they are undirected. */
1155 case BUS_MATCH_ROOT:
1156 case BUS_MATCH_VALUE:
1157 case BUS_MATCH_LEAF:
1158 case _BUS_MATCH_NODE_TYPE_MAX:
1159 case _BUS_MATCH_NODE_TYPE_INVALID:
1160 assert_not_reached("Invalid match type?");
1165 sz += ALIGN8(offsetof(struct kdbus_item, data64) + bus->bloom_size);
1167 m = alloca0_align(sz, 8);
1173 if (src_id != KDBUS_MATCH_ID_ANY) {
1174 item->size = offsetof(struct kdbus_item, id) + sizeof(uint64_t);
1175 item->type = KDBUS_ITEM_ID;
1177 item = KDBUS_ITEM_NEXT(item);
1181 item->size = offsetof(struct kdbus_item, data64) + bus->bloom_size;
1182 item->type = KDBUS_ITEM_BLOOM_MASK;
1183 memcpy(item->data64, bloom, bus->bloom_size);
1184 item = KDBUS_ITEM_NEXT(item);
1188 item->size = offsetof(struct kdbus_item, str) + sender_length + 1;
1189 item->type = KDBUS_ITEM_NAME;
1190 memcpy(item->str, sender, sender_length + 1);
1193 r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_ADD, m);
1197 if (matches_name_change) {
1199 /* If this match could theoretically match
1200 * NameOwnerChanged messages, we need to
1201 * install a second non-bloom filter explitly
1204 r = add_name_change_match(bus, cookie, name_change_arg[0], name_change_arg[1], name_change_arg[2]);
1212 #define internal_match(bus, m) \
1213 ((bus)->hello_flags & KDBUS_HELLO_MONITOR \
1214 ? (isempty(m) ? "eavesdrop='true'" : strappenda((m), ",eavesdrop='true'")) \
1217 static int bus_add_match_internal_dbus1(
1219 const char *match) {
1226 e = internal_match(bus, match);
1228 return sd_bus_call_method(
1230 "org.freedesktop.DBus",
1231 "/org/freedesktop/DBus",
1232 "org.freedesktop.DBus",
1240 int bus_add_match_internal(
1243 struct bus_match_component *components,
1244 unsigned n_components,
1250 return bus_add_match_internal_kernel(bus, components, n_components, cookie);
1252 return bus_add_match_internal_dbus1(bus, match);
1255 int bus_remove_match_internal_kernel(
1259 struct kdbus_cmd_match m;
1265 m.size = offsetof(struct kdbus_cmd_match, items);
1268 r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_REMOVE, &m);
1275 static int bus_remove_match_internal_dbus1(
1277 const char *match) {
1284 e = internal_match(bus, match);
1286 return sd_bus_call_method(
1288 "org.freedesktop.DBus",
1289 "/org/freedesktop/DBus",
1290 "org.freedesktop.DBus",
1298 int bus_remove_match_internal(
1306 return bus_remove_match_internal_kernel(bus, cookie);
1308 return bus_remove_match_internal_dbus1(bus, match);
1311 _public_ int sd_bus_get_name_machine_id(sd_bus *bus, const char *name, sd_id128_t *machine) {
1312 _cleanup_bus_message_unref_ sd_bus_message *reply = NULL, *m = NULL;
1316 assert_return(bus, -EINVAL);
1317 assert_return(name, -EINVAL);
1318 assert_return(machine, -EINVAL);
1319 assert_return(!bus_pid_changed(bus), -ECHILD);
1320 assert_return(service_name_is_valid(name), -EINVAL);
1322 if (!BUS_IS_OPEN(bus->state))
1325 if (streq_ptr(name, bus->unique_name))
1326 return sd_id128_get_machine(machine);
1328 r = sd_bus_message_new_method_call(
1333 "org.freedesktop.DBus.Peer",
1338 r = sd_bus_message_set_auto_start(m, false);
1342 r = sd_bus_call(bus, m, 0, NULL, &reply);
1346 r = sd_bus_message_read(reply, "s", &mid);
1350 return sd_id128_from_string(mid, machine);