bus: split up overly long sd-bus.c into three files

1 files changed, 1937 insertions, 0 deletions

diff --git a/src/libsystemd-bus/bus-objects.c b/src/libsystemd-bus/bus-objects.c
new file mode 100644
index 0000000000..da49d75031
--- /dev/null
+++ b/src/libsystemd-bus/bus-objects.c
@@ -0,0 +1,1937 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2013 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "strv.h"
+#include "set.h"
+#include "bus-internal.h"
+#include "bus-message.h"
+#include "bus-type.h"
+#include "bus-signature.h"
+#include "bus-introspect.h"
+#include "bus-objects.h"
+
+static int node_vtable_get_userdata(
+                sd_bus *bus,
+                const char *path,
+                struct node_vtable *c,
+                void **userdata) {
+
+        void *u;
+        int r;
+
+        assert(bus);
+        assert(path);
+        assert(c);
+
+        u = c->userdata;
+        if (c->find) {
+                r = c->find(bus, path, c->interface, &u, u);
+                if (r <= 0)
+                        return r;
+        }
+
+        if (userdata)
+                *userdata = u;
+
+        return 1;
+}
+
+static void *vtable_property_convert_userdata(const sd_bus_vtable *p, void *u) {
+        assert(p);
+
+        return (uint8_t*) u + p->property.offset;
+}
+
+static int vtable_property_get_userdata(
+                sd_bus *bus,
+                const char *path,
+                struct vtable_member *p,
+                void **userdata) {
+
+        void *u;
+        int r;
+
+        assert(bus);
+        assert(path);
+        assert(p);
+        assert(userdata);
+
+        r = node_vtable_get_userdata(bus, path, p->parent, &u);
+        if (r <= 0)
+                return r;
+
+        *userdata = vtable_property_convert_userdata(p->vtable, u);
+        return 1;
+}
+
+static int add_enumerated_to_set(sd_bus *bus, const char *prefix, struct node_enumerator *first, Set *s) {
+        struct node_enumerator *c;
+        int r;
+
+        assert(bus);
+        assert(prefix);
+        assert(s);
+
+        LIST_FOREACH(enumerators, c, first) {
+                char **children = NULL, **k;
+
+                r = c->callback(bus, prefix, &children, c->userdata);
+                if (r < 0)
+                        return r;
+
+                STRV_FOREACH(k, children) {
+                        if (r < 0) {
+                                free(*k);
+                                continue;
+                        }
+
+                        if (!object_path_is_valid(*k) && object_path_startswith(*k, prefix)) {
+                                free(*k);
+                                r = -EINVAL;
+                                continue;
+                        }
+
+                        r = set_consume(s, *k);
+                }
+
+                free(children);
+                if (r < 0)
+                        return r;
+        }
+
+        return 0;
+}
+
+static int add_subtree_to_set(sd_bus *bus, const char *prefix, struct node *n, Set *s) {
+        struct node *i;
+        int r;
+
+        assert(bus);
+        assert(prefix);
+        assert(n);
+        assert(s);
+
+        r = add_enumerated_to_set(bus, prefix, n->enumerators, s);
+        if (r < 0)
+                return r;
+
+        LIST_FOREACH(siblings, i, n->child) {
+                char *t;
+
+                t = strdup(i->path);
+                if (!t)
+                        return -ENOMEM;
+
+                r = set_consume(s, t);
+                if (r < 0 && r != -EEXIST)
+                        return r;
+
+                r = add_subtree_to_set(bus, prefix, i, s);
+                if (r < 0)
+                        return r;
+        }
+
+        return 0;
+}
+
+static int get_child_nodes(sd_bus *bus, const char *prefix, struct node *n, Set **_s) {
+        Set *s = NULL;
+        int r;
+
+        assert(bus);
+        assert(n);
+        assert(_s);
+
+        s = set_new(string_hash_func, string_compare_func);
+        if (!s)
+                return -ENOMEM;
+
+        r = add_subtree_to_set(bus, prefix, n, s);
+        if (r < 0) {
+                set_free_free(s);
+                return r;
+        }
+
+        *_s = s;
+        return 0;
+}
+
+static int node_callbacks_run(
+                sd_bus *bus,
+                sd_bus_message *m,
+                struct node_callback *first,
+                bool require_fallback,
+                bool *found_object) {
+
+        struct node_callback *c;
+        int r;
+
+        assert(bus);
+        assert(m);
+        assert(found_object);
+
+        LIST_FOREACH(callbacks, c, first) {
+                if (require_fallback && !c->is_fallback)
+                        continue;
+
+                *found_object = true;
+
+                if (c->last_iteration == bus->iteration_counter)
+                        continue;
+
+                r = sd_bus_message_rewind(m, true);
+                if (r < 0)
+                        return r;
+
+                r = c->callback(bus, m, c->userdata);
+                if (r != 0)
+                        return r;
+        }
+
+        return 0;
+}
+
+static int method_callbacks_run(
+                sd_bus *bus,
+                sd_bus_message *m,
+                struct vtable_member *c,
+                bool require_fallback,
+                bool *found_object) {
+
+        const char *signature;
+        void *u;
+        int r;
+
+        assert(bus);
+        assert(m);
+        assert(c);
+        assert(found_object);
+
+        if (require_fallback && !c->parent->is_fallback)
+                return 0;
+
+        r = node_vtable_get_userdata(bus, m->path, c->parent, &u);
+        if (r <= 0)
+                return r;
+
+        *found_object = true;
+
+        r = sd_bus_message_rewind(m, true);
+        if (r < 0)
+                return r;
+
+        r = sd_bus_message_get_signature(m, true, &signature);
+        if (r < 0)
+                return r;
+
+        if (!streq(strempty(c->vtable->method.signature), signature)) {
+                r = sd_bus_reply_method_errorf(bus, m,
+                                               "org.freedesktop.DBus.Error.InvalidArgs",
+                                               "Invalid arguments '%s' to call %s:%s, expecting '%s'.",
+                                               signature, c->interface, c->member, strempty(c->vtable->method.signature));
+                if (r < 0)
+                        return r;
+
+                return 1;
+        }
+
+        if (c->vtable->method.handler)
+                return c->vtable->method.handler(bus, m, u);
+
+        /* If the method callback is NULL, make this a successful NOP */
+        r = sd_bus_reply_method_return(bus, m, NULL);
+        if (r < 0)
+                return r;
+
+        return 1;
+}
+
+static int invoke_property_get(
+                sd_bus *bus,
+                const sd_bus_vtable *v,
+                const char *path,
+                const char *interface,
+                const char *property,
+                sd_bus_message *m,
+                sd_bus_error *error,
+                void *userdata) {
+
+        int r;
+        void *p;
+
+        assert(bus);
+        assert(v);
+
+        if (v->property.get)
+                return v->property.get(bus, path, interface, property, m, error, userdata);
+
+        /* Automatic handling if no callback is defined. */
+
+        assert(bus_type_is_basic(v->property.signature[0]));
+
+        switch (v->property.signature[0]) {
+
+        case SD_BUS_TYPE_STRING:
+        case SD_BUS_TYPE_OBJECT_PATH:
+        case SD_BUS_TYPE_SIGNATURE:
+                p = *(char**) userdata;
+                break;
+
+        default:
+                p = userdata;
+                break;
+        }
+
+        r = sd_bus_message_append_basic(m, v->property.signature[0], p);
+        if (r < 0)
+                return r;
+
+        return 1;
+}
+
+static int invoke_property_set(
+                sd_bus *bus,
+                const sd_bus_vtable *v,
+                const char *path,
+                const char *interface,
+                const char *property,
+                sd_bus_message *value,
+                sd_bus_error *error,
+                void *userdata) {
+
+        int r;
+
+        assert(bus);
+        assert(v);
+
+        if (v->property.set)
+                return v->property.set(bus, path, interface, property, value, error, userdata);
+
+        /*  Automatic handling if no callback is defined. */
+
+        assert(signature_is_single(v->property.signature, false));
+        assert(bus_type_is_basic(v->property.signature[0]));
+
+        switch (v->property.signature[0]) {
+
+        case SD_BUS_TYPE_STRING:
+        case SD_BUS_TYPE_OBJECT_PATH:
+        case SD_BUS_TYPE_SIGNATURE: {
+                const char *p;
+                char *n;
+
+                r = sd_bus_message_read_basic(value, v->property.signature[0], &p);
+                if (r < 0)
+                        return r;
+
+                n = strdup(p);
+                if (!n)
+                        return -ENOMEM;
+
+                free(*(char**) userdata);
+                *(char**) userdata = n;
+
+                break;
+        }
+
+        default:
+                r = sd_bus_message_read_basic(value, v->property.signature[0], userdata);
+                if (r < 0)
+                        return r;
+
+                break;
+        }
+
+        return 1;
+}
+
+static int property_get_set_callbacks_run(
+                sd_bus *bus,
+                sd_bus_message *m,
+                struct vtable_member *c,
+                bool require_fallback,
+                bool is_get,
+                bool *found_object) {
+
+        _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
+        _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
+        void *u;
+        int r;
+
+        assert(bus);
+        assert(m);
+        assert(found_object);
+
+        if (require_fallback && !c->parent->is_fallback)
+                return 0;
+
+        r = vtable_property_get_userdata(bus, m->path, c, &u);
+        if (r <= 0)
+                return r;
+
+        *found_object = true;
+
+        r = sd_bus_message_new_method_return(bus, m, &reply);
+        if (r < 0)
+                return r;
+
+        c->last_iteration = bus->iteration_counter;
+
+        if (is_get) {
+                r = sd_bus_message_open_container(reply, 'v', c->vtable->property.signature);
+                if (r < 0)
+                        return r;
+
+                r = invoke_property_get(bus, c->vtable, m->path, c->interface, c->member, reply, &error, u);
+                if (r < 0)
+                        return r;
+
+                if (sd_bus_error_is_set(&error)) {
+                        r = sd_bus_reply_method_error(bus, m, &error);
+                        if (r < 0)
+                                return r;
+
+                        return 1;
+                }
+
+                r = sd_bus_message_close_container(reply);
+                if (r < 0)
+                        return r;
+
+        } else {
+                if (c->vtable->type != _SD_BUS_VTABLE_WRITABLE_PROPERTY)
+                        sd_bus_error_setf(&error, "org.freedesktop.DBus.Error.PropertyReadOnly", "Property '%s' is not writable.", c->member);
+                else  {
+                        r = sd_bus_message_enter_container(m, 'v', c->vtable->property.signature);
+                        if (r < 0)
+                                return r;
+
+                        r = invoke_property_set(bus, c->vtable, m->path, c->interface, c->member, m, &error, u);
+                        if (r < 0)
+                                return r;
+                }
+
+                if (sd_bus_error_is_set(&error)) {
+                        r = sd_bus_reply_method_error(bus, m, &error);
+                        if (r < 0)
+                                return r;
+
+                        return 1;
+                }
+
+                r = sd_bus_message_exit_container(m);
+                if (r < 0)
+                        return r;
+        }
+
+        r = sd_bus_send(bus, reply, NULL);
+        if (r < 0)
+                return r;
+
+        return 1;
+}
+
+static int vtable_append_all_properties(
+                sd_bus *bus,
+                sd_bus_message *reply,
+                const char *path,
+                struct node_vtable *c,
+                void *userdata,
+                sd_bus_error *error) {
+
+        const sd_bus_vtable *v;
+        int r;
+
+        assert(bus);
+        assert(reply);
+        assert(c);
+
+        for (v = c->vtable+1; v->type != _SD_BUS_VTABLE_END; v++) {
+                if (v->type != _SD_BUS_VTABLE_PROPERTY && v->type != _SD_BUS_VTABLE_WRITABLE_PROPERTY)
+                        continue;
+
+                r = sd_bus_message_open_container(reply, 'e', "sv");
+                if (r < 0)
+                        return r;
+
+                r = sd_bus_message_append(reply, "s", c->interface);
+                if (r < 0)
+                        return r;
+
+                r = sd_bus_message_open_container(reply, 'v', v->property.signature);
+                if (r < 0)
+                        return r;
+
+                r = invoke_property_get(bus, v, path, c->interface, v->property.member, reply, error, vtable_property_convert_userdata(v, userdata));
+                if (r < 0)
+                        return r;
+
+                if (sd_bus_error_is_set(error))
+                        return 0;
+
+                r = sd_bus_message_close_container(reply);
+                if (r < 0)
+                        return r;
+
+                r = sd_bus_message_close_container(reply);
+                if (r < 0)
+                        return r;
+        }
+
+        return 1;
+}
+
+static int property_get_all_callbacks_run(
+                sd_bus *bus,
+                sd_bus_message *m,
+                struct node_vtable *first,
+                bool require_fallback,
+                const char *iface,
+                bool *found_object) {
+
+        _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
+        struct node_vtable *c;
+        bool found_interface = false;
+        int r;
+
+        assert(bus);
+        assert(m);
+        assert(found_object);
+
+        r = sd_bus_message_new_method_return(bus, m, &reply);
+        if (r < 0)
+                return r;
+
+        r = sd_bus_message_open_container(reply, 'a', "{sv}");
+        if (r < 0)
+                return r;
+
+        LIST_FOREACH(vtables, c, first) {
+                _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
+                void *u;
+
+                if (require_fallback && !c->is_fallback)
+                        continue;
+
+                r = node_vtable_get_userdata(bus, m->path, c, &u);
+                if (r < 0)
+                        return r;
+                if (r == 0)
+                        continue;
+
+                *found_object = true;
+
+                if (iface && !streq(c->interface, iface))
+                        continue;
+                found_interface = true;
+
+                c->last_iteration = bus->iteration_counter;
+
+                r = vtable_append_all_properties(bus, reply, m->path, c, u, &error);
+                if (r < 0)
+                        return r;
+
+                if (sd_bus_error_is_set(&error)) {
+                        r = sd_bus_reply_method_error(bus, m, &error);
+                        if (r < 0)
+                                return r;
+
+                        return 1;
+                }
+        }
+
+        if (!found_interface) {
+                r = sd_bus_reply_method_errorf(
+                                bus, m,
+                                "org.freedesktop.DBus.Error.UnknownInterface",
+                                "Unknown interface '%s'.", iface);
+                if (r < 0)
+                        return r;
+
+                return 1;
+        }
+
+        r = sd_bus_message_close_container(reply);
+        if (r < 0)
+                return r;
+
+        r = sd_bus_send(bus, reply, NULL);
+        if (r < 0)
+                return r;
+
+        return 1;
+}
+
+static bool bus_node_with_object_manager(sd_bus *bus, struct node *n) {
+        assert(bus);
+
+        if (n->object_manager)
+                return true;
+
+        if (n->parent)
+                return bus_node_with_object_manager(bus, n->parent);
+
+        return false;
+}
+
+static bool bus_node_exists(sd_bus *bus, struct node *n, const char *path, bool require_fallback) {
+        struct node_vtable *c;
+        struct node_callback *k;
+
+        assert(bus);
+        assert(n);
+
+        /* Tests if there's anything attached directly to this node
+         * for the specified path */
+
+        LIST_FOREACH(callbacks, k, n->callbacks) {
+                if (require_fallback && !k->is_fallback)
+                        continue;
+
+                return true;
+        }
+
+        LIST_FOREACH(vtables, c, n->vtables) {
+
+                if (require_fallback && !c->is_fallback)
+                        continue;
+
+                if (node_vtable_get_userdata(bus, path, c, NULL) > 0)
+                        return true;
+        }
+
+        return !require_fallback && (n->enumerators || n->object_manager);
+}
+
+static int process_introspect(
+                sd_bus *bus,
+                sd_bus_message *m,
+                struct node *n,
+                bool require_fallback,
+                bool *found_object) {
+
+        _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
+        _cleanup_set_free_free_ Set *s = NULL;
+        struct introspect intro;
+        struct node_vtable *c;
+        bool empty;
+        int r;
+
+        assert(bus);
+        assert(m);
+        assert(n);
+        assert(found_object);
+
+        r = get_child_nodes(bus, m->path, n, &s);
+        if (r < 0)
+                return r;
+
+        r = introspect_begin(&intro);
+        if (r < 0)
+                return r;
+
+        r = introspect_write_default_interfaces(&intro, bus_node_with_object_manager(bus, n));
+        if (r < 0)
+                return r;
+
+        empty = set_isempty(s);
+
+        LIST_FOREACH(vtables, c, n->vtables) {
+                if (require_fallback && !c->is_fallback)
+                        continue;
+
+                r = node_vtable_get_userdata(bus, m->path, c, NULL);
+                if (r < 0)
+                        return r;
+                if (r == 0)
+                        continue;
+
+                empty = false;
+
+                r = introspect_write_interface(&intro, c->interface, c->vtable);
+                if (r < 0)
+                        goto finish;
+        }
+
+        if (empty) {
+                /* Nothing?, let's see if we exist at all, and if not
+                 * refuse to do anything */
+                r = bus_node_exists(bus, n, m->path, require_fallback);
+                if (r < 0)
+                        return r;
+
+                if (r == 0)
+                        goto finish;
+        }
+
+        *found_object = true;
+
+        r = introspect_write_child_nodes(&intro, s, m->path);
+        if (r < 0)
+                goto finish;
+
+        r = introspect_finish(&intro, bus, m, &reply);
+        if (r < 0)
+                goto finish;
+
+        r = sd_bus_send(bus, reply, NULL);
+        if (r < 0)
+                goto finish;
+
+        r = 1;
+
+finish:
+        introspect_free(&intro);
+        return r;
+}
+
+static int object_manager_serialize_vtable(
+                sd_bus *bus,
+                sd_bus_message *reply,
+                const char *path,
+                struct node_vtable *c,
+                sd_bus_error *error) {
+
+        void *u;
+        int r;
+
+        assert(bus);
+        assert(reply);
+        assert(path);
+        assert(c);
+        assert(error);
+
+        r = node_vtable_get_userdata(bus, path, c, &u);
+        if (r <= 0)
+                return r;
+
+        r = sd_bus_message_open_container(reply, 'e', "sa{sv}");
+        if (r < 0)
+                return r;
+
+        r = sd_bus_message_append(reply, "s", c->interface);
+        if (r < 0)
+                return r;
+
+        r = sd_bus_message_open_container(reply, 'a', "{sv}");
+        if (r < 0)
+                return r;
+
+        r = vtable_append_all_properties(bus, reply, path, c, u, error);
+        if (r < 0)
+                return r;
+
+        r = sd_bus_message_close_container(reply);
+        if (r < 0)
+                return r;
+
+        r = sd_bus_message_close_container(reply);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+static int object_manager_serialize_path(
+                sd_bus *bus,
+                sd_bus_message *reply,
+                const char *prefix,
+                const char *path,
+                bool require_fallback,
+                sd_bus_error *error) {
+
+        struct node_vtable *i;
+        struct node *n;
+        int r;
+
+        assert(bus);
+        assert(reply);
+        assert(prefix);
+        assert(path);
+        assert(error);
+
+        n = hashmap_get(bus->nodes, prefix);
+        if (!n)
+                return 0;
+
+        r = sd_bus_message_open_container(reply, 'e', "oa{sa{sv}}");
+        if (r < 0)
+                return r;
+
+        r = sd_bus_message_append(reply, "o", path);
+        if (r < 0)
+                return r;
+
+        r = sd_bus_message_open_container(reply, 'a', "{sa{sv}}");
+        if (r < 0)
+                return r;
+
+        LIST_FOREACH(vtables, i, n->vtables) {
+
+                if (require_fallback && !i->is_fallback)
+                        continue;
+
+                r = object_manager_serialize_vtable(bus, reply, path, i, error);
+                if (r < 0)
+                        return r;
+                if (sd_bus_error_is_set(error))
+                        return 0;
+        }
+
+        r = sd_bus_message_close_container(reply);
+        if (r < 0)
+                return r;
+
+        r = sd_bus_message_close_container(reply);
+        if (r < 0)
+                return r;
+
+        return 1;
+}
+
+static int object_manager_serialize_path_and_fallbacks(
+                sd_bus *bus,
+                sd_bus_message *reply,
+                const char *path,
+                sd_bus_error *error) {
+
+        size_t pl;
+        int r;
+
+        assert(bus);
+        assert(reply);
+        assert(path);
+        assert(error);
+
+        /* First, add all vtables registered for this path */
+        r = object_manager_serialize_path(bus, reply, path, path, false, error);
+        if (r < 0)
+                return r;
+        if (sd_bus_error_is_set(error))
+                return 0;
+
+        /* Second, add fallback vtables registered for any of the prefixes */
+        pl = strlen(path);
+        if (pl > 1) {
+                char p[pl + 1];
+                strcpy(p, path);
+
+                for (;;) {
+                        char *e;
+
+                        e = strrchr(p, '/');
+                        if (e == p || !e)
+                                break;
+
+                        *e = 0;
+
+                        r = object_manager_serialize_path(bus, reply, p, path, true, error);
+                        if (r < 0)
+                                return r;
+
+                        if (sd_bus_error_is_set(error))
+                                return 0;
+                }
+        }
+
+        return 0;
+}
+
+static int process_get_managed_objects(
+                sd_bus *bus,
+                sd_bus_message *m,
+                struct node *n,
+                bool require_fallback,
+                bool *found_object) {
+
+        _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
+        _cleanup_set_free_free_ Set *s = NULL;
+        bool empty;
+        int r;
+
+        assert(bus);
+        assert(m);
+        assert(n);
+        assert(found_object);
+
+        if (!bus_node_with_object_manager(bus, n))
+                return 0;
+
+        r = get_child_nodes(bus, m->path, n, &s);
+        if (r < 0)
+                return r;
+
+        r = sd_bus_message_new_method_return(bus, m, &reply);
+        if (r < 0)
+                return r;
+
+        r = sd_bus_message_open_container(reply, 'a', "{oa{sa{sv}}}");
+        if (r < 0)
+                return r;
+
+        empty = set_isempty(s);
+        if (empty) {
+                struct node_vtable *c;
+
+                /* Hmm, so we have no children? Then let's check
+                 * whether we exist at all, i.e. whether at least one
+                 * vtable exists. */
+
+                LIST_FOREACH(vtables, c, n->vtables) {
+
+                        if (require_fallback && !c->is_fallback)
+                                continue;
+
+                        if (r < 0)
+                                return r;
+                        if (r == 0)
+                                continue;
+
+                        empty = false;
+                        break;
+                }
+
+                if (empty)
+                        return 0;
+        } else {
+                Iterator i;
+                char *path;
+
+                SET_FOREACH(path, s, i) {
+                        _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
+
+                        r = object_manager_serialize_path_and_fallbacks(bus, reply, path, &error);
+                        if (r < 0)
+                                return -ENOMEM;
+
+                        if (sd_bus_error_is_set(&error)) {
+                                r = sd_bus_reply_method_error(bus, m, &error);
+                                if (r < 0)
+                                        return r;
+
+                                return 1;
+                        }
+                }
+        }
+
+        r = sd_bus_message_close_container(reply);
+        if (r < 0)
+                return r;
+
+        r = sd_bus_send(bus, reply, NULL);
+        if (r < 0)
+                return r;
+
+        return 1;
+}
+
+static int object_find_and_run(
+                sd_bus *bus,
+                sd_bus_message *m,
+                const char *p,
+                bool require_fallback,
+                bool *found_object) {
+
+        struct node *n;
+        struct vtable_member vtable_key, *v;
+        int r;
+
+        assert(bus);
+        assert(m);
+        assert(p);
+        assert(found_object);
+
+        n = hashmap_get(bus->nodes, p);
+        if (!n)
+                return 0;
+
+        /* First, try object callbacks */
+        r = node_callbacks_run(bus, m, n->callbacks, require_fallback, found_object);
+        if (r != 0)
+                return r;
+
+        if (!m->interface || !m->member)
+                return 0;
+
+        /* Then, look for a known method */
+        vtable_key.path = (char*) p;
+        vtable_key.interface = m->interface;
+        vtable_key.member = m->member;
+
+        v = hashmap_get(bus->vtable_methods, &vtable_key);
+        if (v) {
+                r = method_callbacks_run(bus, m, v, require_fallback, found_object);
+                if (r != 0)
+                        return r;
+        }
+
+        /* Then, look for a known property */
+        if (streq(m->interface, "org.freedesktop.DBus.Properties")) {
+                bool get = false;
+
+                get = streq(m->member, "Get");
+
+                if (get || streq(m->member, "Set")) {
+
+                        r = sd_bus_message_rewind(m, true);
+                        if (r < 0)
+                                return r;
+
+                        vtable_key.path = (char*) p;
+
+                        r = sd_bus_message_read(m, "ss", &vtable_key.interface, &vtable_key.member);
+                        if (r < 0)
+                                return r;
+
+                        v = hashmap_get(bus->vtable_properties, &vtable_key);
+                        if (v) {
+                                r = property_get_set_callbacks_run(bus, m, v, require_fallback, get, found_object);
+                                if (r != 0)
+                                        return r;
+                        }
+
+                } else if (streq(m->member, "GetAll")) {
+                        const char *iface;
+
+                        r = sd_bus_message_rewind(m, true);
+                        if (r < 0)
+                                return r;
+
+                        r = sd_bus_message_read(m, "s", &iface);
+                        if (r < 0)
+                                return r;
+
+                        if (iface[0] == 0)
+                                iface = NULL;
+
+                        r = property_get_all_callbacks_run(bus, m, n->vtables, require_fallback, iface, found_object);
+                        if (r != 0)
+                                return r;
+                }
+
+        } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Introspectable", "Introspect")) {
+
+                r = process_introspect(bus, m, n, require_fallback, found_object);
+                if (r != 0)
+                        return r;
+
+        } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus.ObjectManager", "GetManagedObjects")) {
+
+                r = process_get_managed_objects(bus, m, n, require_fallback, found_object);
+                if (r != 0)
+                        return r;
+        }
+
+        if (!*found_object) {
+                r = bus_node_exists(bus, n, m->path, require_fallback);
+                if (r < 0)
+                        return r;
+
+                if (r > 0)
+                        *found_object = true;
+        }
+
+        return 0;
+}
+
+int bus_process_object(sd_bus *bus, sd_bus_message *m) {
+        int r;
+        size_t pl;
+        bool found_object = false;
+
+        assert(bus);
+        assert(m);
+
+        if (m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL)
+                return 0;
+
+        if (!m->path)
+                return 0;
+
+        if (hashmap_isempty(bus->nodes))
+                return 0;
+
+        pl = strlen(m->path);
+        do {
+                char p[pl+1];
+
+                bus->nodes_modified = false;
+
+                r = object_find_and_run(bus, m, m->path, false, &found_object);
+                if (r != 0)
+                        return r;
+
+                /* Look for fallback prefixes */
+                strcpy(p, m->path);
+                for (;;) {
+                        char *e;
+
+                        if (streq(p, "/"))
+                                break;
+
+                        if (bus->nodes_modified)
+                                break;
+
+                        e = strrchr(p, '/');
+                        assert(e);
+                        if (e == p)
+                                *(e+1) = 0;
+                        else
+                                *e = 0;
+
+                        r = object_find_and_run(bus, m, p, true, &found_object);
+                        if (r != 0)
+                                return r;
+                }
+
+        } while (bus->nodes_modified);
+
+        if (!found_object)
+                return 0;
+
+        if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Properties", "Get") ||
+            sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Properties", "Set"))
+                r = sd_bus_reply_method_errorf(
+                                bus, m,
+                                "org.freedesktop.DBus.Error.UnknownProperty",
+                                "Unknown property or interface.");
+        else
+                r = sd_bus_reply_method_errorf(
+                                bus, m,
+                                "org.freedesktop.DBus.Error.UnknownMethod",
+                                "Unknown method '%s' or interface '%s'.", m->member, m->interface);
+
+        if (r < 0)
+                return r;
+
+        return 1;
+}
+
+static struct node *bus_node_allocate(sd_bus *bus, const char *path) {
+        struct node *n, *parent;
+        const char *e;
+        char *s, *p;
+        int r;
+
+        assert(bus);
+        assert(path);
+        assert(path[0] == '/');
+
+        n = hashmap_get(bus->nodes, path);
+        if (n)
+                return n;
+
+        r = hashmap_ensure_allocated(&bus->nodes, string_hash_func, string_compare_func);
+        if (r < 0)
+                return NULL;
+
+        s = strdup(path);
+        if (!s)
+                return NULL;
+
+        if (streq(path, "/"))
+                parent = NULL;
+        else {
+                e = strrchr(path, '/');
+                assert(e);
+
+                p = strndupa(path, MAX(1, path - e));
+
+                parent = bus_node_allocate(bus, p);
+                if (!parent) {
+                        free(s);
+                        return NULL;
+                }
+        }
+
+        n = new0(struct node, 1);
+        if (!n)
+                return NULL;
+
+        n->parent = parent;
+        n->path = s;
+
+        r = hashmap_put(bus->nodes, s, n);
+        if (r < 0) {
+                free(s);
+                free(n);
+                return NULL;
+        }
+
+        if (parent)
+                LIST_PREPEND(struct node, siblings, parent->child, n);
+
+        return n;
+}
+
+static void bus_node_gc(sd_bus *b, struct node *n) {
+        assert(b);
+
+        if (!n)
+                return;
+
+        if (n->child ||
+            n->callbacks ||
+            n->vtables ||
+            n->enumerators ||
+            n->object_manager)
+                return;
+
+        assert(hashmap_remove(b->nodes, n->path) == n);
+
+        if (n->parent)
+                LIST_REMOVE(struct node, siblings, n->parent->child, n);
+
+        free(n->path);
+        bus_node_gc(b, n->parent);
+        free(n);
+}
+
+static int bus_add_object(
+                sd_bus *b,
+                bool fallback,
+                const char *path,
+                sd_bus_message_handler_t callback,
+                void *userdata) {
+
+        struct node_callback *c;
+        struct node *n;
+        int r;
+
+        if (!b)
+                return -EINVAL;
+        if (!object_path_is_valid(path))
+                return -EINVAL;
+        if (!callback)
+                return -EINVAL;
+        if (bus_pid_changed(b))
+                return -ECHILD;
+
+        n = bus_node_allocate(b, path);
+        if (!n)
+                return -ENOMEM;
+
+        c = new0(struct node_callback, 1);
+        if (!c) {
+                r = -ENOMEM;
+                goto fail;
+        }
+
+        c->node = n;
+        c->callback = callback;
+        c->userdata = userdata;
+        c->is_fallback = fallback;
+
+        LIST_PREPEND(struct node_callback, callbacks, n->callbacks, c);
+        return 0;
+
+fail:
+        free(c);
+        bus_node_gc(b, n);
+        return r;
+}
+
+static int bus_remove_object(
+                sd_bus *bus,
+                bool fallback,
+                const char *path,
+                sd_bus_message_handler_t callback,
+                void *userdata) {
+
+        struct node_callback *c;
+        struct node *n;
+
+        if (!bus)
+                return -EINVAL;
+        if (!object_path_is_valid(path))
+                return -EINVAL;
+        if (!callback)
+                return -EINVAL;
+        if (bus_pid_changed(bus))
+                return -ECHILD;
+
+        n = hashmap_get(bus->nodes, path);
+        if (!n)
+                return 0;
+
+        LIST_FOREACH(callbacks, c, n->callbacks)
+                if (c->callback == callback && c->userdata == userdata && c->is_fallback == fallback)
+                        break;
+        if (!c)
+                return 0;
+
+        LIST_REMOVE(struct node_callback, callbacks, n->callbacks, c);
+        free(c);
+
+        bus_node_gc(bus, n);
+
+        return 1;
+}
+
+int sd_bus_add_object(sd_bus *bus, const char *path, sd_bus_message_handler_t callback, void *userdata) {
+        return bus_add_object(bus, false, path, callback, userdata);
+}
+
+int sd_bus_remove_object(sd_bus *bus, const char *path, sd_bus_message_handler_t callback, void *userdata) {
+        return bus_remove_object(bus, false, path, callback, userdata);
+}
+
+int sd_bus_add_fallback(sd_bus *bus, const char *prefix, sd_bus_message_handler_t callback, void *userdata) {
+        return bus_add_object(bus, true, prefix, callback, userdata);
+}
+
+int sd_bus_remove_fallback(sd_bus *bus, const char *prefix, sd_bus_message_handler_t callback, void *userdata) {
+        return bus_remove_object(bus, true, prefix, callback, userdata);
+}
+
+static void free_node_vtable(sd_bus *bus, struct node_vtable *w) {
+        assert(bus);
+
+        if (!w)
+                return;
+
+        if (w->interface && w->node && w->vtable) {
+                const sd_bus_vtable *v;
+
+                for (v = w->vtable; v->type != _SD_BUS_VTABLE_END; v++) {
+                        struct vtable_member *x = NULL;
+
+                        switch (v->type) {
+
+                        case _SD_BUS_VTABLE_METHOD: {
+                                struct vtable_member key;
+
+                                key.path = w->node->path;
+                                key.interface = w->interface;
+                                key.member = v->method.member;
+
+                                x = hashmap_remove(bus->vtable_methods, &key);
+                                break;
+                        }
+
+                        case _SD_BUS_VTABLE_PROPERTY:
+                        case _SD_BUS_VTABLE_WRITABLE_PROPERTY: {
+                                struct vtable_member key;
+
+                                key.path = w->node->path;
+                                key.interface = w->interface;
+                                key.member = v->property.member;
+                                x = hashmap_remove(bus->vtable_properties, &key);
+                                break;
+                        }}
+
+                        free(x);
+                }
+        }
+
+        free(w->interface);
+        free(w);
+}
+
+static unsigned vtable_member_hash_func(const void *a) {
+        const struct vtable_member *m = a;
+
+        return
+                string_hash_func(m->path) ^
+                string_hash_func(m->interface) ^
+                string_hash_func(m->member);
+}
+
+static int vtable_member_compare_func(const void *a, const void *b) {
+        const struct vtable_member *x = a, *y = b;
+        int r;
+
+        r = strcmp(x->path, y->path);
+        if (r != 0)
+                return r;
+
+        r = strcmp(x->interface, y->interface);
+        if (r != 0)
+                return r;
+
+        return strcmp(x->member, y->member);
+}
+
+static int add_object_vtable_internal(
+                sd_bus *bus,
+                const char *path,
+                const char *interface,
+                const sd_bus_vtable *vtable,
+                bool fallback,
+                sd_bus_object_find_t find,
+                void *userdata) {
+
+        struct node_vtable *c = NULL, *i;
+        const sd_bus_vtable *v;
+        struct node *n;
+        int r;
+
+        if (!bus)
+                return -EINVAL;
+        if (!object_path_is_valid(path))
+                return -EINVAL;
+        if (!interface_name_is_valid(interface))
+                return -EINVAL;
+        if (!vtable || vtable[0].type != _SD_BUS_VTABLE_START || vtable[0].start.element_size != sizeof(struct sd_bus_vtable))
+                return -EINVAL;
+        if (bus_pid_changed(bus))
+                return -ECHILD;
+
+        r = hashmap_ensure_allocated(&bus->vtable_methods, vtable_member_hash_func, vtable_member_compare_func);
+        if (r < 0)
+                return r;
+
+        r = hashmap_ensure_allocated(&bus->vtable_properties, vtable_member_hash_func, vtable_member_compare_func);
+        if (r < 0)
+                return r;
+
+        n = bus_node_allocate(bus, path);
+        if (!n)
+                return -ENOMEM;
+
+        LIST_FOREACH(vtables, i, n->vtables) {
+                if (streq(i->interface, interface)) {
+                        r = -EEXIST;
+                        goto fail;
+                }
+
+                if (i->is_fallback != fallback) {
+                        r = -EPROTOTYPE;
+                        goto fail;
+                }
+        }
+
+        c = new0(struct node_vtable, 1);
+        if (!c) {
+                r = -ENOMEM;
+                goto fail;
+        }
+
+        c->node = n;
+        c->is_fallback = fallback;
+        c->vtable = vtable;
+        c->userdata = userdata;
+        c->find = find;
+
+        c->interface = strdup(interface);
+        if (!c->interface) {
+                r = -ENOMEM;
+                goto fail;
+        }
+
+        for (v = c->vtable+1; v->type != _SD_BUS_VTABLE_END; v++) {
+
+                switch (v->type) {
+
+                case _SD_BUS_VTABLE_METHOD: {
+                        struct vtable_member *m;
+
+                        if (!member_name_is_valid(v->method.member) ||
+                            !signature_is_valid(strempty(v->method.signature), false) ||
+                            !signature_is_valid(strempty(v->method.result), false) ||
+                            !(v->method.handler || (isempty(v->method.signature) && isempty(v->method.result))) ||
+                            v->flags & (SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE|SD_BUS_VTABLE_PROPERTY_INVALIDATE_ONLY)) {
+                                r = -EINVAL;
+                                goto fail;
+                        }
+
+                        m = new0(struct vtable_member, 1);
+                        if (!m) {
+                                r = -ENOMEM;
+                                goto fail;
+                        }
+
+                        m->parent = c;
+                        m->path = n->path;
+                        m->interface = c->interface;
+                        m->member = v->method.member;
+                        m->vtable = v;
+
+                        r = hashmap_put(bus->vtable_methods, m, m);
+                        if (r < 0) {
+                                free(m);
+                                goto fail;
+                        }
+
+                        break;
+                }
+
+                case _SD_BUS_VTABLE_WRITABLE_PROPERTY:
+
+                        if (!(v->property.set || bus_type_is_basic(v->property.signature[0]))) {
+                                r = -EINVAL;
+                                goto fail;
+                        }
+
+                        /* Fall through */
+
+                case _SD_BUS_VTABLE_PROPERTY: {
+                        struct vtable_member *m;
+
+                        if (!member_name_is_valid(v->property.member) ||
+                            !signature_is_single(v->property.signature, false) ||
+                            !(v->property.get || bus_type_is_basic(v->property.signature[0])) ||
+                            v->flags & SD_BUS_VTABLE_METHOD_NO_REPLY ||
+                            (v->flags & SD_BUS_VTABLE_PROPERTY_INVALIDATE_ONLY && !(v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE))) {
+                                r = -EINVAL;
+                                goto fail;
+                        }
+
+
+                        m = new0(struct vtable_member, 1);
+                        if (!m) {
+                                r = -ENOMEM;
+                                goto fail;
+                        }
+
+                        m->parent = c;
+                        m->path = n->path;
+                        m->interface = c->interface;
+                        m->member = v->property.member;
+                        m->vtable = v;
+
+                        r = hashmap_put(bus->vtable_properties, m, m);
+                        if (r < 0) {
+                                free(m);
+                                goto fail;
+                        }
+
+                        break;
+                }
+
+                case _SD_BUS_VTABLE_SIGNAL:
+
+                        if (!member_name_is_valid(v->signal.member) ||
+                            !signature_is_single(strempty(v->signal.signature), false)) {
+                                r = -EINVAL;
+                                goto fail;
+                        }
+
+                        break;
+
+                default:
+                        r = -EINVAL;
+                        goto fail;
+                }
+        }
+
+        LIST_PREPEND(struct node_vtable, vtables, n->vtables, c);
+        return 0;
+
+fail:
+        if (c)
+                free_node_vtable(bus, c);
+
+        bus_node_gc(bus, n);
+        return r;
+}
+
+static int remove_object_vtable_internal(
+                sd_bus *bus,
+                const char *path,
+                const char *interface,
+                bool fallback) {
+
+        struct node_vtable *c;
+        struct node *n;
+
+        if (!bus)
+                return -EINVAL;
+        if (!object_path_is_valid(path))
+                return -EINVAL;
+        if (!interface_name_is_valid(interface))
+                return -EINVAL;
+        if (bus_pid_changed(bus))
+                return -ECHILD;
+
+        n = hashmap_get(bus->nodes, path);
+        if (!n)
+                return 0;
+
+        LIST_FOREACH(vtables, c, n->vtables)
+                if (streq(c->interface, interface) && c->is_fallback == fallback)
+                        break;
+
+        if (!c)
+                return 0;
+
+        LIST_REMOVE(struct node_vtable, vtables, n->vtables, c);
+
+        free_node_vtable(bus, c);
+        return 1;
+}
+
+int sd_bus_add_object_vtable(
+                sd_bus *bus,
+                const char *path,
+                const char *interface,
+                const sd_bus_vtable *vtable,
+                void *userdata) {
+
+        return add_object_vtable_internal(bus, path, interface, vtable, false, NULL, userdata);
+}
+
+int sd_bus_remove_object_vtable(
+                sd_bus *bus,
+                const char *path,
+                const char *interface) {
+
+        return remove_object_vtable_internal(bus, path, interface, false);
+}
+
+int sd_bus_add_fallback_vtable(
+                sd_bus *bus,
+                const char *path,
+                const char *interface,
+                const sd_bus_vtable *vtable,
+                sd_bus_object_find_t find,
+                void *userdata) {
+
+        return add_object_vtable_internal(bus, path, interface, vtable, true, find, userdata);
+}
+
+int sd_bus_remove_fallback_vtable(
+                sd_bus *bus,
+                const char *path,
+                const char *interface) {
+
+        return remove_object_vtable_internal(bus, path, interface, true);
+}
+
+int sd_bus_add_node_enumerator(
+                sd_bus *bus,
+                const char *path,
+                sd_bus_node_enumerator_t callback,
+                void *userdata) {
+
+        struct node_enumerator *c;
+        struct node *n;
+        int r;
+
+        if (!bus)
+                return -EINVAL;
+        if (!object_path_is_valid(path))
+                return -EINVAL;
+        if (!callback)
+                return -EINVAL;
+        if (bus_pid_changed(bus))
+                return -ECHILD;
+
+        n = bus_node_allocate(bus, path);
+        if (!n)
+                return -ENOMEM;
+
+        c = new0(struct node_enumerator, 1);
+        if (!c) {
+                r = -ENOMEM;
+                goto fail;
+        }
+
+        c->node = n;
+        c->callback = callback;
+        c->userdata = userdata;
+
+        LIST_PREPEND(struct node_enumerator, enumerators, n->enumerators, c);
+        return 0;
+
+fail:
+        free(c);
+        bus_node_gc(bus, n);
+        return r;
+}
+
+int sd_bus_remove_node_enumerator(
+                sd_bus *bus,
+                const char *path,
+                sd_bus_node_enumerator_t callback,
+                void *userdata) {
+
+        struct node_enumerator *c;
+        struct node *n;
+
+        if (!bus)
+                return -EINVAL;
+        if (!object_path_is_valid(path))
+                return -EINVAL;
+        if (!callback)
+                return -EINVAL;
+        if (bus_pid_changed(bus))
+                return -ECHILD;
+
+        n = hashmap_get(bus->nodes, path);
+        if (!n)
+                return 0;
+
+        LIST_FOREACH(enumerators, c, n->enumerators)
+                if (c->callback == callback && c->userdata == userdata)
+                        break;
+
+        if (!c)
+                return 0;
+
+        LIST_REMOVE(struct node_enumerator, enumerators, n->enumerators, c);
+        free(c);
+
+        bus_node_gc(bus, n);
+
+        return 1;
+}
+
+static int emit_properties_changed_on_interface(
+                sd_bus *bus,
+                const char *prefix,
+                const char *path,
+                const char *interface,
+                bool require_fallback,
+                char **names) {
+
+        _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
+        bool has_invalidating = false;
+        struct vtable_member key;
+        struct node_vtable *c;
+        struct node *n;
+        char **property;
+        void *u = NULL;
+        int r;
+
+        assert(bus);
+        assert(path);
+        assert(interface);
+
+        n = hashmap_get(bus->nodes, prefix);
+        if (!n)
+                return 0;
+
+        LIST_FOREACH(vtables, c, n->vtables) {
+                if (require_fallback && !c->is_fallback)
+                        continue;
+
+                if (streq(c->interface, interface))
+                        break;
+        }
+
+        if (!c)
+                return 0;
+
+        r = node_vtable_get_userdata(bus, path, c, &u);
+        if (r <= 0)
+                return r;
+
+        r = sd_bus_message_new_signal(bus, path, "org.freedesktop.DBus.Properties", "PropertiesChanged", &m);
+        if (r < 0)
+                return r;
+
+        r = sd_bus_message_append(m, "s", interface);
+        if (r < 0)
+                return r;
+
+        r = sd_bus_message_open_container(m, 'a', "{sv}");
+        if (r < 0)
+                return r;
+
+        key.path = prefix;
+        key.interface = interface;
+
+        STRV_FOREACH(property, names) {
+                _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
+                struct vtable_member *v;
+
+                key.member = *property;
+                v = hashmap_get(bus->vtable_properties, &key);
+                if (!v)
+                        return -ENOENT;
+
+                assert(c == v->parent);
+
+                if (!(v->vtable->flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE))
+                        return -EDOM;
+                if (v->vtable->flags & SD_BUS_VTABLE_PROPERTY_INVALIDATE_ONLY) {
+                        has_invalidating = true;
+                        continue;
+                }
+
+                r = sd_bus_message_open_container(m, 'e', "sv");
+                if (r < 0)
+                        return r;
+
+                r = sd_bus_message_append(m, "s", *property);
+                if (r < 0)
+                        return r;
+
+                r = sd_bus_message_open_container(m, 'v', v->vtable->property.signature);
+                if (r < 0)
+                        return r;
+
+                r = invoke_property_get(bus, v->vtable, m->path, interface, *property, m, &error, vtable_property_convert_userdata(v->vtable, u));
+                if (r < 0)
+                        return r;
+
+                if (sd_bus_error_is_set(&error))
+                        return bus_error_to_errno(&error);
+
+                r = sd_bus_message_close_container(m);
+                if (r < 0)
+                        return r;
+
+                r = sd_bus_message_close_container(m);
+                if (r < 0)
+                        return r;
+        }
+
+        r = sd_bus_message_close_container(m);
+        if (r < 0)
+                return r;
+
+        r = sd_bus_message_open_container(m, 'a', "s");
+        if (r < 0)
+                return r;
+
+        if (has_invalidating) {
+                STRV_FOREACH(property, names) {
+                        struct vtable_member *v;
+
+                        key.member = *property;
+                        assert_se(v = hashmap_get(bus->vtable_properties, &key));
+                        assert(c == v->parent);
+
+                        if (!(v->vtable->flags & SD_BUS_VTABLE_PROPERTY_INVALIDATE_ONLY))
+                                continue;
+
+                        r = sd_bus_message_append(m, "s", *property);
+                        if (r < 0)
+                                return r;
+                }
+        }
+
+        r = sd_bus_message_close_container(m);
+        if (r < 0)
+                return r;
+
+        r = sd_bus_send(bus, m, NULL);
+        if (r < 0)
+                return r;
+
+        return 1;
+}
+
+int sd_bus_emit_properties_changed_strv(sd_bus *bus, const char *path, const char *interface, char **names) {
+        size_t pl;
+        int r;
+
+        if (!bus)
+                return -EINVAL;
+        if (!object_path_is_valid(path))
+                return -EINVAL;
+        if (!interface_name_is_valid(interface))
+                return -EINVAL;
+
+        r = emit_properties_changed_on_interface(bus, path, path, interface, false, names);
+        if (r != 0)
+                return r;
+
+        pl = strlen(path);
+        if (pl > 1 ) {
+                char p[pl+1];
+
+                strcpy(p, path);
+                for (;;) {
+                        char *e;
+
+                        if (streq(p, "/"))
+                                break;
+
+                        e = strrchr(p, '/');
+                        assert(e);
+                        if (e == p)
+                                *(e+1) = 0;
+                        else
+                                *e = 0;
+
+                        r = emit_properties_changed_on_interface(bus, p, path, interface, true, names);
+                        if (r != 0)
+                                return r;
+                }
+        }
+
+        return -ENOENT;
+}
+
+int sd_bus_emit_properties_changed(sd_bus *bus, const char *path, const char *interface, const char *name, ...)  {
+        _cleanup_strv_free_ char **names = NULL;
+        va_list ap;
+
+        va_start(ap, name);
+        names = strv_new_ap(name, ap);
+        va_end(ap);
+
+        if (!names)
+                return -ENOMEM;
+
+        return sd_bus_emit_properties_changed_strv(bus, path, interface, names);
+}
+
+int sd_bus_emit_interfaces_added(sd_bus *bus, const char *path, const char *interfaces, ...) {
+        return -ENOSYS;
+}
+
+int sd_bus_emit_interfaces_removed(sd_bus *bus, const char *path, const char *interfaces, ...) {
+        return -ENOSYS;
+}
+
+int sd_bus_add_object_manager(sd_bus *bus, const char *path) {
+        struct node *n;
+
+        if (!bus)
+                return -EINVAL;
+        if (!object_path_is_valid(path))
+                return -EINVAL;
+        if (bus_pid_changed(bus))
+                return -ECHILD;
+
+        n = bus_node_allocate(bus, path);
+        if (!n)
+                return -ENOMEM;
+
+        n->object_manager = true;
+        return 0;
+}
+
+int sd_bus_remove_object_manager(sd_bus *bus, const char *path) {
+        struct node *n;
+
+        if (!bus)
+                return -EINVAL;
+        if (!object_path_is_valid(path))
+                return -EINVAL;
+        if (bus_pid_changed(bus))
+                return -ECHILD;
+
+        n = hashmap_get(bus->nodes, path);
+        if (!n)
+                return 0;
+
+        if (!n->object_manager)
+                return 0;
+
+        n->object_manager = false;
+        bus_node_gc(bus, n);
+        return 1;
+}