libsystemd-bus: rename to libsystemd

Documentation was updated to refer to either 'libsystemd' or 'sd-bus' in place
of libsystemd-bus.

1 files changed, 0 insertions, 2507 deletions

diff --git a/src/libsystemd-bus/bus-objects.c b/src/libsystemd-bus/bus-objects.c
deleted file mode 100644
index b116a5dd10..0000000000
--- a/src/libsystemd-bus/bus-objects.c
+++ /dev/null
@@ -1,2507 +0,0 @@
-/*-*- 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 <sys/capability.h>
-
-#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"
-#include "bus-util.h"
-
-static int node_vtable_get_userdata(
-                sd_bus *bus,
-                const char *path,
-                struct node_vtable *c,
-                void **userdata,
-                sd_bus_error *error) {
-
-        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, error);
-                if (r < 0)
-                        return r;
-                if (sd_bus_error_is_set(error))
-                        return -sd_bus_error_get_errno(error);
-                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->x.property.offset;
-}
-
-static int vtable_property_get_userdata(
-                sd_bus *bus,
-                const char *path,
-                struct vtable_member *p,
-                void **userdata,
-                sd_bus_error *error) {
-
-        void *u;
-        int r;
-
-        assert(bus);
-        assert(path);
-        assert(p);
-        assert(userdata);
-
-        r = node_vtable_get_userdata(bus, path, p->parent, &u, error);
-        if (r <= 0)
-                return r;
-        if (bus->nodes_modified)
-                return 0;
-
-        *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,
-                sd_bus_error *error) {
-
-        struct node_enumerator *c;
-        int r;
-
-        assert(bus);
-        assert(prefix);
-        assert(s);
-
-        LIST_FOREACH(enumerators, c, first) {
-                char **children = NULL, **k;
-
-                if (bus->nodes_modified)
-                        return 0;
-
-                r = c->callback(bus, prefix, c->userdata, &children, error);
-                if (r < 0)
-                        return r;
-                if (sd_bus_error_is_set(error))
-                        return -sd_bus_error_get_errno(error);
-
-                STRV_FOREACH(k, children) {
-                        if (r < 0) {
-                                free(*k);
-                                continue;
-                        }
-
-                        if (!object_path_is_valid(*k)){
-                                free(*k);
-                                r = -EINVAL;
-                                continue;
-                        }
-
-                        if (!object_path_startswith(*k, prefix)) {
-                                free(*k);
-                                continue;
-                        }
-
-                        r = set_consume(s, *k);
-                        if (r == -EEXIST)
-                                r = 0;
-                }
-
-                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,
-                sd_bus_error *error) {
-
-        struct node *i;
-        int r;
-
-        assert(bus);
-        assert(prefix);
-        assert(n);
-        assert(s);
-
-        r = add_enumerated_to_set(bus, prefix, n->enumerators, s, error);
-        if (r < 0)
-                return r;
-        if (bus->nodes_modified)
-                return 0;
-
-        LIST_FOREACH(siblings, i, n->child) {
-                char *t;
-
-                if (!object_path_startswith(i->path, prefix))
-                        continue;
-
-                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, error);
-                if (r < 0)
-                        return r;
-                if (bus->nodes_modified)
-                        return 0;
-        }
-
-        return 0;
-}
-
-static int get_child_nodes(
-                sd_bus *bus,
-                const char *prefix,
-                struct node *n,
-                Set **_s,
-                sd_bus_error *error) {
-
-        Set *s = NULL;
-        int r;
-
-        assert(bus);
-        assert(prefix);
-        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, error);
-        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) {
-                _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL;
-
-                if (bus->nodes_modified)
-                        return 0;
-
-                if (require_fallback && !c->is_fallback)
-                        continue;
-
-                *found_object = true;
-
-                if (c->last_iteration == bus->iteration_counter)
-                        continue;
-
-                c->last_iteration = bus->iteration_counter;
-
-                r = sd_bus_message_rewind(m, true);
-                if (r < 0)
-                        return r;
-
-                r = c->callback(bus, m, c->userdata, &error_buffer);
-                r = bus_maybe_reply_error(m, r, &error_buffer);
-                if (r != 0)
-                        return r;
-        }
-
-        return 0;
-}
-
-#define CAPABILITY_SHIFT(x) (((x) >> __builtin_ctzll(_SD_BUS_VTABLE_CAPABILITY_MASK)) & 0xFFFF)
-
-static int check_access(sd_bus *bus, sd_bus_message *m, struct vtable_member *c, sd_bus_error *error) {
-        _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
-        uint64_t cap;
-        uid_t uid;
-        int r;
-
-        assert(bus);
-        assert(m);
-        assert(c);
-
-        /* If the entire bus is trusted let's grant access */
-        if (bus->trusted)
-                return 0;
-
-        /* If the member is marked UNPRIVILEGED let's grant access */
-        if (c->vtable->flags & SD_BUS_VTABLE_UNPRIVILEGED)
-                return 0;
-
-        /* If we are not connected to kdbus we cannot retrieve the
-         * effective capability set without race. Since we need this
-         * for a security decision we cannot use racy data, hence
-         * don't request it. */
-        if (bus->is_kernel)
-                r = sd_bus_query_sender_creds(m, SD_BUS_CREDS_UID|SD_BUS_CREDS_EFFECTIVE_CAPS, &creds);
-        else
-                r = sd_bus_query_sender_creds(m, SD_BUS_CREDS_UID, &creds);
-        if (r < 0)
-                return r;
-
-        /* Check have the caller has the requested capability
-         * set. Note that the flags value contains the capability
-         * number plus one, which we need to subtract here. We do this
-         * so that we have 0 as special value for "default
-         * capability". */
-        cap = CAPABILITY_SHIFT(c->vtable->flags);
-        if (cap == 0)
-                cap = CAPABILITY_SHIFT(c->parent->vtable[0].flags);
-        if (cap == 0)
-                cap = CAP_SYS_ADMIN;
-        else
-                cap --;
-
-        r = sd_bus_creds_has_effective_cap(creds, cap);
-        if (r > 0)
-                return 1;
-
-        /* Caller has same UID as us, then let's grant access */
-        r = sd_bus_creds_get_uid(creds, &uid);
-        if (r >= 0) {
-                if (uid == getuid())
-                        return 1;
-        }
-
-        return sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED, "Access to %s.%s() not permitted.", c->interface, c->member);
-}
-
-static int method_callbacks_run(
-                sd_bus *bus,
-                sd_bus_message *m,
-                struct vtable_member *c,
-                bool require_fallback,
-                bool *found_object) {
-
-        _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
-        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 = check_access(bus, m, c, &error);
-        if (r < 0)
-                return bus_maybe_reply_error(m, r, &error);
-
-        r = node_vtable_get_userdata(bus, m->path, c->parent, &u, &error);
-        if (r <= 0)
-                return bus_maybe_reply_error(m, r, &error);
-        if (bus->nodes_modified)
-                return 0;
-
-        *found_object = true;
-
-        if (c->last_iteration == bus->iteration_counter)
-                return 0;
-
-        c->last_iteration = bus->iteration_counter;
-
-        r = sd_bus_message_rewind(m, true);
-        if (r < 0)
-                return r;
-
-        signature = sd_bus_message_get_signature(m, true);
-        if (!signature)
-                return -EINVAL;
-
-        if (!streq(strempty(c->vtable->x.method.signature), signature))
-                return sd_bus_reply_method_errorf(
-                                m,
-                                SD_BUS_ERROR_INVALID_ARGS,
-                                "Invalid arguments '%s' to call %s.%s(), expecting '%s'.",
-                                signature, c->interface, c->member, strempty(c->vtable->x.method.signature));
-
-        /* Keep track what the signature of the reply to this message
-         * should be, so that this can be enforced when sealing the
-         * reply. */
-        m->enforced_reply_signature = strempty(c->vtable->x.method.result);
-
-        if (c->vtable->x.method.handler) {
-                r = c->vtable->x.method.handler(bus, m, u, &error);
-                return bus_maybe_reply_error(m, r, &error);
-        }
-
-        /* If the method callback is NULL, make this a successful NOP */
-        r = sd_bus_reply_method_return(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 *reply,
-                void *userdata,
-                sd_bus_error *error) {
-
-        const void *p;
-        int r;
-
-        assert(bus);
-        assert(v);
-        assert(path);
-        assert(interface);
-        assert(property);
-        assert(reply);
-
-        if (v->x.property.get) {
-                r = v->x.property.get(bus, path, interface, property, reply, userdata, error);
-                if (r < 0)
-                        return r;
-                if (sd_bus_error_is_set(error))
-                        return -sd_bus_error_get_errno(error);
-                return r;
-        }
-
-        /* Automatic handling if no callback is defined. */
-
-        if (streq(v->x.property.signature, "as"))
-                return sd_bus_message_append_strv(reply, *(char***) userdata);
-
-        assert(signature_is_single(v->x.property.signature, false));
-        assert(bus_type_is_basic(v->x.property.signature[0]));
-
-        switch (v->x.property.signature[0]) {
-
-        case SD_BUS_TYPE_STRING:
-        case SD_BUS_TYPE_SIGNATURE:
-                p = strempty(*(char**) userdata);
-                break;
-
-        case SD_BUS_TYPE_OBJECT_PATH:
-                p = *(char**) userdata;
-                assert(p);
-                break;
-
-        default:
-                p = userdata;
-                break;
-        }
-
-        return sd_bus_message_append_basic(reply, v->x.property.signature[0], p);
-}
-
-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,
-                void *userdata,
-                sd_bus_error *error) {
-
-        int r;
-
-        assert(bus);
-        assert(v);
-        assert(path);
-        assert(interface);
-        assert(property);
-        assert(value);
-
-        if (v->x.property.set) {
-                r = v->x.property.set(bus, path, interface, property, value, userdata, error);
-                if (r < 0)
-                        return r;
-                if (sd_bus_error_is_set(error))
-                        return -sd_bus_error_get_errno(error);
-                return r;
-        }
-
-        /*  Automatic handling if no callback is defined. */
-
-        assert(signature_is_single(v->x.property.signature, false));
-        assert(bus_type_is_basic(v->x.property.signature[0]));
-
-        switch (v->x.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->x.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->x.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_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
-        _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
-        void *u;
-        int r;
-
-        assert(bus);
-        assert(m);
-        assert(c);
-        assert(found_object);
-
-        if (require_fallback && !c->parent->is_fallback)
-                return 0;
-
-        r = vtable_property_get_userdata(bus, m->path, c, &u, &error);
-        if (r <= 0)
-                return bus_maybe_reply_error(m, r, &error);
-        if (bus->nodes_modified)
-                return 0;
-
-        *found_object = true;
-
-        r = sd_bus_message_new_method_return(m, &reply);
-        if (r < 0)
-                return r;
-
-        if (is_get) {
-                /* Note that we do not protect against reexecution
-                 * here (using the last_iteration check, see below),
-                 * should the node tree have changed and we got called
-                 * again. We assume that property Get() calls are
-                 * ultimately without side-effects or if they aren't
-                 * then at least idempotent. */
-
-                r = sd_bus_message_open_container(reply, 'v', c->vtable->x.property.signature);
-                if (r < 0)
-                        return r;
-
-                /* Note that we do not do an access check here. Read
-                 * access to properties is always unrestricted, since
-                 * PropertiesChanged signals broadcast contents
-                 * anyway. */
-
-                r = invoke_property_get(bus, c->vtable, m->path, c->interface, c->member, reply, u, &error);
-                if (r < 0)
-                        return bus_maybe_reply_error(m, r, &error);
-
-                if (bus->nodes_modified)
-                        return 0;
-
-                r = sd_bus_message_close_container(reply);
-                if (r < 0)
-                        return r;
-
-        } else {
-                if (c->vtable->type != _SD_BUS_VTABLE_WRITABLE_PROPERTY)
-                        return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_PROPERTY_READ_ONLY, "Property '%s' is not writable.", c->member);
-
-                /* Avoid that we call the set routine more than once
-                 * if the processing of this message got restarted
-                 * because the node tree changed. */
-                if (c->last_iteration == bus->iteration_counter)
-                        return 0;
-
-                c->last_iteration = bus->iteration_counter;
-
-                r = sd_bus_message_enter_container(m, 'v', c->vtable->x.property.signature);
-                if (r < 0)
-                        return r;
-
-                r = check_access(bus, m, c, &error);
-                if (r < 0)
-                        return bus_maybe_reply_error(m, r, &error);
-
-                r = invoke_property_set(bus, c->vtable, m->path, c->interface, c->member, m, u, &error);
-                if (r < 0)
-                        return bus_maybe_reply_error(m, r, &error);
-
-                if (bus->nodes_modified)
-                        return 0;
-
-                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_one_property(
-                sd_bus *bus,
-                sd_bus_message *reply,
-                const char *path,
-                struct node_vtable *c,
-                const sd_bus_vtable *v,
-                void *userdata,
-                sd_bus_error *error) {
-
-        int r;
-
-        assert(bus);
-        assert(reply);
-        assert(path);
-        assert(c);
-        assert(v);
-
-        r = sd_bus_message_open_container(reply, 'e', "sv");
-        if (r < 0)
-                return r;
-
-        r = sd_bus_message_append(reply, "s", v->x.property.member);
-        if (r < 0)
-                return r;
-
-        r = sd_bus_message_open_container(reply, 'v', v->x.property.signature);
-        if (r < 0)
-                return r;
-
-        r = invoke_property_get(bus, v, path, c->interface, v->x.property.member, reply, vtable_property_convert_userdata(v, userdata), error);
-        if (r < 0)
-                return r;
-        if (bus->nodes_modified)
-                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 0;
-}
-
-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(path);
-        assert(c);
-
-        if (c->vtable[0].flags & SD_BUS_VTABLE_HIDDEN)
-                return 1;
-
-        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;
-
-                if (v->flags & SD_BUS_VTABLE_HIDDEN)
-                        continue;
-
-                r = vtable_append_one_property(bus, reply, path, c, v, userdata, error);
-                if (r < 0)
-                        return r;
-                if (bus->nodes_modified)
-                        return 0;
-        }
-
-        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;
-        int r;
-
-        assert(bus);
-        assert(m);
-        assert(found_object);
-
-        r = sd_bus_message_new_method_return(m, &reply);
-        if (r < 0)
-                return r;
-
-        r = sd_bus_message_open_container(reply, 'a', "{sv}");
-        if (r < 0)
-                return r;
-
-        found_interface = !iface ||
-                streq(iface, "org.freedesktop.DBus.Properties") ||
-                streq(iface, "org.freedesktop.DBus.Peer") ||
-                streq(iface, "org.freedesktop.DBus.Introspectable");
-
-        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, &error);
-                if (r < 0)
-                        return bus_maybe_reply_error(m, r, &error);
-                if (bus->nodes_modified)
-                        return 0;
-                if (r == 0)
-                        continue;
-
-                *found_object = true;
-
-                if (iface && !streq(c->interface, iface))
-                        continue;
-                found_interface = true;
-
-                r = vtable_append_all_properties(bus, reply, m->path, c, u, &error);
-                if (r < 0)
-                        return bus_maybe_reply_error(m, r, &error);
-                if (bus->nodes_modified)
-                        return 0;
-        }
-
-        if (!found_interface) {
-                r = sd_bus_reply_method_errorf(
-                                m,
-                                SD_BUS_ERROR_UNKNOWN_INTERFACE,
-                                "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);
-        assert(n);
-
-        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);
-        assert(path);
-
-        /* 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) {
-                _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
-
-                if (require_fallback && !c->is_fallback)
-                        continue;
-
-                if (node_vtable_get_userdata(bus, path, c, NULL, &error) > 0)
-                        return true;
-                if (bus->nodes_modified)
-                        return false;
-        }
-
-        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_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
-        _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
-        _cleanup_set_free_free_ Set *s = NULL;
-        const char *previous_interface = 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, &error);
-        if (r < 0)
-                return bus_maybe_reply_error(m, r, &error);
-        if (bus->nodes_modified)
-                return 0;
-
-        r = introspect_begin(&intro, bus->trusted);
-        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, &error);
-                if (r < 0) {
-                        r = bus_maybe_reply_error(m, r, &error);
-                        goto finish;
-                }
-                if (bus->nodes_modified) {
-                        r = 0;
-                        goto finish;
-                }
-                if (r == 0)
-                        continue;
-
-                empty = false;
-
-                if (c->vtable[0].flags & SD_BUS_VTABLE_HIDDEN)
-                        continue;
-
-                if (!streq_ptr(previous_interface, c->interface)) {
-
-                        if (previous_interface)
-                                fputs(" </interface>\n", intro.f);
-
-                        fprintf(intro.f, " <interface name=\"%s\">\n", c->interface);
-                }
-
-                r = introspect_write_interface(&intro, c->vtable);
-                if (r < 0)
-                        goto finish;
-
-                previous_interface = c->interface;
-        }
-
-        if (previous_interface)
-                fputs(" </interface>\n", intro.f);
-
-        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 (bus->nodes_modified)
-                        return 0;
-                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_path(
-                sd_bus *bus,
-                sd_bus_message *reply,
-                const char *prefix,
-                const char *path,
-                bool require_fallback,
-                sd_bus_error *error) {
-
-        const char *previous_interface = NULL;
-        bool found_something = false;
-        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;
-
-        LIST_FOREACH(vtables, i, n->vtables) {
-                void *u;
-
-                if (require_fallback && !i->is_fallback)
-                        continue;
-
-                r = node_vtable_get_userdata(bus, path, i, &u, error);
-                if (r < 0)
-                        return r;
-                if (bus->nodes_modified)
-                        return 0;
-                if (r == 0)
-                        continue;
-
-                if (!found_something) {
-
-                        /* Open the object part */
-
-                        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;
-
-                        found_something = true;
-                }
-
-                if (!streq_ptr(previous_interface, i->interface)) {
-
-                        /* Maybe close the previous interface part */
-
-                        if (previous_interface) {
-                                r = sd_bus_message_close_container(reply);
-                                if (r < 0)
-                                        return r;
-
-                                r = sd_bus_message_close_container(reply);
-                                if (r < 0)
-                                        return r;
-                        }
-
-                        /* Open the new interface part */
-
-                        r = sd_bus_message_open_container(reply, 'e', "sa{sv}");
-                        if (r < 0)
-                                return r;
-
-                        r = sd_bus_message_append(reply, "s", i->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, i, u, error);
-                if (r < 0)
-                        return r;
-                if (bus->nodes_modified)
-                        return 0;
-
-                previous_interface = i->interface;
-        }
-
-        if (previous_interface) {
-                r = sd_bus_message_close_container(reply);
-                if (r < 0)
-                        return r;
-
-                r = sd_bus_message_close_container(reply);
-                if (r < 0)
-                        return r;
-        }
-
-        if (found_something) {
-                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) {
-
-        char *prefix;
-        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 (bus->nodes_modified)
-                return 0;
-
-        /* Second, add fallback vtables registered for any of the prefixes */
-        prefix = alloca(strlen(path) + 1);
-        OBJECT_PATH_FOREACH_PREFIX(prefix, path) {
-                r = object_manager_serialize_path(bus, reply, prefix, path, true, error);
-                if (r < 0)
-                        return r;
-                if (bus->nodes_modified)
-                        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_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
-        _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, &error);
-        if (r < 0)
-                return r;
-        if (bus->nodes_modified)
-                return 0;
-
-        r = sd_bus_message_new_method_return(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) {
-                        r = object_manager_serialize_path_and_fallbacks(bus, reply, path, &error);
-                        if (r < 0)
-                                return r;
-
-                        if (bus->nodes_modified)
-                                return 0;
-                }
-        }
-
-        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 (bus->nodes_modified)
-                return 0;
-
-        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;
-                if (bus->nodes_modified)
-                        return 0;
-        }
-
-        /* 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 sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INVALID_ARGS, "Expected interface and member parameters");
-
-                        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 sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INVALID_ARGS, "Expected interface parameter");
-
-                        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")) {
-
-                if (!isempty(sd_bus_message_get_signature(m, true)))
-                        return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INVALID_ARGS, "Expected no parameters");
-
-                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")) {
-
-                if (!isempty(sd_bus_message_get_signature(m, true)))
-                        return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INVALID_ARGS, "Expected no parameters");
-
-                r = process_get_managed_objects(bus, m, n, require_fallback, found_object);
-                if (r != 0)
-                        return r;
-        }
-
-        if (bus->nodes_modified)
-                return 0;
-
-        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_METHOD_CALL)
-                return 0;
-
-        if (hashmap_isempty(bus->nodes))
-                return 0;
-
-        /* Never respond to broadcast messages */
-        if (bus->bus_client && !m->destination)
-                return 0;
-
-        assert(m->path);
-        assert(m->member);
-
-        pl = strlen(m->path);
-        do {
-                char prefix[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 */
-                OBJECT_PATH_FOREACH_PREFIX(prefix, m->path) {
-
-                        if (bus->nodes_modified)
-                                break;
-
-                        r = object_find_and_run(bus, m, prefix, 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(
-                                m,
-                                SD_BUS_ERROR_UNKNOWN_PROPERTY,
-                                "Unknown property or interface.");
-        else
-                r = sd_bus_reply_method_errorf(
-                                m,
-                                SD_BUS_ERROR_UNKNOWN_METHOD,
-                                "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;
-        _cleanup_free_ char *s = NULL;
-        char *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)
-                        return NULL;
-        }
-
-        n = new0(struct node, 1);
-        if (!n)
-                return NULL;
-
-        n->parent = parent;
-        n->path = s;
-        s = NULL; /* do not free */
-
-        r = hashmap_put(bus->nodes, n->path, n);
-        if (r < 0) {
-                free(n->path);
-                free(n);
-                return NULL;
-        }
-
-        if (parent)
-                LIST_PREPEND(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(siblings, n->parent->child, n);
-
-        free(n->path);
-        bus_node_gc(b, n->parent);
-        free(n);
-}
-
-static int bus_add_object(
-                sd_bus *bus,
-                bool fallback,
-                const char *path,
-                sd_bus_message_handler_t callback,
-                void *userdata) {
-
-        struct node_callback *c;
-        struct node *n;
-        int r;
-
-        assert_return(bus, -EINVAL);
-        assert_return(object_path_is_valid(path), -EINVAL);
-        assert_return(callback, -EINVAL);
-        assert_return(!bus_pid_changed(bus), -ECHILD);
-
-        n = bus_node_allocate(bus, 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(callbacks, n->callbacks, c);
-        bus->nodes_modified = true;
-
-        return 0;
-
-fail:
-        free(c);
-        bus_node_gc(bus, 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;
-
-        assert_return(bus, -EINVAL);
-        assert_return(object_path_is_valid(path), -EINVAL);
-        assert_return(callback, -EINVAL);
-        assert_return(!bus_pid_changed(bus), -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(callbacks, n->callbacks, c);
-        free(c);
-
-        bus_node_gc(bus, n);
-        bus->nodes_modified = true;
-
-        return 1;
-}
-
-_public_ 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);
-}
-
-_public_ 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);
-}
-
-_public_ 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);
-}
-
-_public_ 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->x.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->x.property.member;
-                                x = hashmap_remove(bus->vtable_properties, &key);
-                                break;
-                        }}
-
-                        free(x);
-                }
-        }
-
-        free(w->interface);
-        free(w);
-}
-
-static unsigned long vtable_member_hash_func(const void *a, const uint8_t hash_key[HASH_KEY_SIZE]) {
-        const struct vtable_member *m = a;
-        uint8_t hash_key2[HASH_KEY_SIZE];
-        unsigned long ret;
-
-        assert(m);
-
-        ret = string_hash_func(m->path, hash_key);
-
-        /* Use a slightly different hash key for the interface */
-        memcpy(hash_key2, hash_key, HASH_KEY_SIZE);
-        hash_key2[0]++;
-        ret ^= string_hash_func(m->interface, hash_key2);
-
-        /* And an even different one for the  member */
-        hash_key2[0]++;
-        ret ^= string_hash_func(m->member, hash_key2);
-
-        return ret;
-}
-
-static int vtable_member_compare_func(const void *a, const void *b) {
-        const struct vtable_member *x = a, *y = b;
-        int r;
-
-        assert(x);
-        assert(y);
-
-        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, *existing = NULL;
-        const sd_bus_vtable *v;
-        struct node *n;
-        int r;
-
-        assert_return(bus, -EINVAL);
-        assert_return(object_path_is_valid(path), -EINVAL);
-        assert_return(interface_name_is_valid(interface), -EINVAL);
-        assert_return(vtable, -EINVAL);
-        assert_return(vtable[0].type == _SD_BUS_VTABLE_START, -EINVAL);
-        assert_return(vtable[0].x.start.element_size == sizeof(struct sd_bus_vtable), -EINVAL);
-        assert_return(!bus_pid_changed(bus), -ECHILD);
-        assert_return(!streq(interface, "org.freedesktop.DBus.Properties") &&
-                      !streq(interface, "org.freedesktop.DBus.Introspectable") &&
-                      !streq(interface, "org.freedesktop.DBus.Peer") &&
-                      !streq(interface, "org.freedesktop.DBus.ObjectManager"), -EINVAL);
-
-        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 (i->is_fallback != fallback) {
-                        r = -EPROTOTYPE;
-                        goto fail;
-                }
-
-                if (streq(i->interface, interface)) {
-
-                        if (i->vtable == vtable) {
-                                r = -EEXIST;
-                                goto fail;
-                        }
-
-                        existing = i;
-                }
-        }
-
-        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->x.method.member) ||
-                            !signature_is_valid(strempty(v->x.method.signature), false) ||
-                            !signature_is_valid(strempty(v->x.method.result), false) ||
-                            !(v->x.method.handler || (isempty(v->x.method.signature) && isempty(v->x.method.result))) ||
-                            v->flags & (SD_BUS_VTABLE_PROPERTY_CONST|SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE|SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION)) {
-                                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->x.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->x.property.set || bus_type_is_basic(v->x.property.signature[0]))) {
-                                r = -EINVAL;
-                                goto fail;
-                        }
-
-                        /* Fall through */
-
-                case _SD_BUS_VTABLE_PROPERTY: {
-                        struct vtable_member *m;
-
-                        if (!member_name_is_valid(v->x.property.member) ||
-                            !signature_is_single(v->x.property.signature, false) ||
-                            !(v->x.property.get || bus_type_is_basic(v->x.property.signature[0]) || streq(v->x.property.signature, "as")) ||
-                            v->flags & SD_BUS_VTABLE_METHOD_NO_REPLY ||
-                            (!!(v->flags & SD_BUS_VTABLE_PROPERTY_CONST) + !!(v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE) + !!(v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION)) > 1 ||
-                            (v->flags & SD_BUS_VTABLE_UNPRIVILEGED && v->type == _SD_BUS_VTABLE_PROPERTY)) {
-                                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->x.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->x.signal.member) ||
-                            !signature_is_valid(strempty(v->x.signal.signature), false) ||
-                            v->flags & SD_BUS_VTABLE_UNPRIVILEGED) {
-                                r = -EINVAL;
-                                goto fail;
-                        }
-
-                        break;
-
-                default:
-                        r = -EINVAL;
-                        goto fail;
-                }
-        }
-
-        LIST_INSERT_AFTER(vtables, n->vtables, existing, c);
-        bus->nodes_modified = true;
-
-        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,
-                const sd_bus_vtable *vtable,
-                bool fallback,
-                sd_bus_object_find_t find,
-                void *userdata) {
-
-        struct node_vtable *c;
-        struct node *n;
-
-        assert_return(bus, -EINVAL);
-        assert_return(object_path_is_valid(path), -EINVAL);
-        assert_return(interface_name_is_valid(interface), -EINVAL);
-        assert_return(!bus_pid_changed(bus), -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 &&
-                    c->vtable == vtable &&
-                    c->find == find &&
-                    c->userdata == userdata)
-                        break;
-
-        if (!c)
-                return 0;
-
-        LIST_REMOVE(vtables, n->vtables, c);
-
-        free_node_vtable(bus, c);
-        bus_node_gc(bus, n);
-
-        bus->nodes_modified = true;
-
-        return 1;
-}
-
-_public_ 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);
-}
-
-_public_ int sd_bus_remove_object_vtable(
-                sd_bus *bus,
-                const char *path,
-                const char *interface,
-                const sd_bus_vtable *vtable,
-                void *userdata) {
-
-        return remove_object_vtable_internal(bus, path, interface, vtable, false, NULL, userdata);
-}
-
-_public_ 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);
-}
-
-_public_ int sd_bus_remove_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 remove_object_vtable_internal(bus, path, interface, vtable, true, find, userdata);
-}
-
-_public_ 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;
-
-        assert_return(bus, -EINVAL);
-        assert_return(object_path_is_valid(path), -EINVAL);
-        assert_return(callback, -EINVAL);
-        assert_return(!bus_pid_changed(bus), -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(enumerators, n->enumerators, c);
-
-        bus->nodes_modified = true;
-
-        return 0;
-
-fail:
-        free(c);
-        bus_node_gc(bus, n);
-        return r;
-}
-
-_public_ 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;
-
-        assert_return(bus, -EINVAL);
-        assert_return(object_path_is_valid(path), -EINVAL);
-        assert_return(callback, -EINVAL);
-        assert_return(!bus_pid_changed(bus), -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(enumerators, n->enumerators, c);
-        free(c);
-
-        bus_node_gc(bus, n);
-
-        bus->nodes_modified = true;
-
-        return 1;
-}
-
-static int emit_properties_changed_on_interface(
-                sd_bus *bus,
-                const char *prefix,
-                const char *path,
-                const char *interface,
-                bool require_fallback,
-                bool *found_interface,
-                char **names) {
-
-        _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
-        _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
-        bool has_invalidating = false, has_changing = false;
-        struct vtable_member key = {};
-        struct node_vtable *c;
-        struct node *n;
-        char **property;
-        void *u = NULL;
-        int r;
-
-        assert(bus);
-        assert(prefix);
-        assert(path);
-        assert(interface);
-        assert(found_interface);
-
-        n = hashmap_get(bus->nodes, prefix);
-        if (!n)
-                return 0;
-
-        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;
-
-        LIST_FOREACH(vtables, c, n->vtables) {
-                if (require_fallback && !c->is_fallback)
-                        continue;
-
-                if (!streq(c->interface, interface))
-                        continue;
-
-                r = node_vtable_get_userdata(bus, path, c, &u, &error);
-                if (r < 0)
-                        return r;
-                if (bus->nodes_modified)
-                        return 0;
-                if (r == 0)
-                        continue;
-
-                *found_interface = true;
-
-                if (names) {
-                        /* If the caller specified a list of
-                         * properties we include exactly those in the
-                         * PropertiesChanged message */
-
-                        STRV_FOREACH(property, names) {
-                                struct vtable_member *v;
-
-                                assert_return(member_name_is_valid(*property), -EINVAL);
-
-                                key.member = *property;
-                                v = hashmap_get(bus->vtable_properties, &key);
-                                if (!v)
-                                        return -ENOENT;
-
-                                /* If there are two vtables for the same
-                                 * interface, let's handle this property when
-                                 * we come to that vtable. */
-                                if (c != v->parent)
-                                        continue;
-
-                                assert_return(v->vtable->flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE ||
-                                              v->vtable->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION, -EDOM);
-
-                                assert_return(!(v->vtable->flags & SD_BUS_VTABLE_HIDDEN), -EDOM);
-
-                                if (v->vtable->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION) {
-                                        has_invalidating = true;
-                                        continue;
-                                }
-
-                                has_changing = true;
-
-                                r = vtable_append_one_property(bus, m, m->path, c, v->vtable, u, &error);
-                                if (r < 0)
-                                        return r;
-                                if (bus->nodes_modified)
-                                        return 0;
-                        }
-                } else {
-                        const sd_bus_vtable *v;
-
-                        /* If the caller specified no properties list
-                         * we include all properties that are marked
-                         * as changing in the message. */
-
-                        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;
-
-                                if (v->flags & SD_BUS_VTABLE_HIDDEN)
-                                        continue;
-
-                                if (v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION) {
-                                        has_invalidating = true;
-                                        continue;
-                                }
-
-                                if (!(v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE))
-                                        continue;
-
-                                has_changing = true;
-
-                                r = vtable_append_one_property(bus, m, m->path, c, v, u, &error);
-                                if (r < 0)
-                                        return r;
-                                if (bus->nodes_modified)
-                                        return 0;
-                        }
-                }
-        }
-
-        if (!has_invalidating && !has_changing)
-                return 0;
-
-        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) {
-                LIST_FOREACH(vtables, c, n->vtables) {
-                        if (require_fallback && !c->is_fallback)
-                                continue;
-
-                        if (!streq(c->interface, interface))
-                                continue;
-
-                        r = node_vtable_get_userdata(bus, path, c, &u, &error);
-                        if (r < 0)
-                                return r;
-                        if (bus->nodes_modified)
-                                return 0;
-                        if (r == 0)
-                                continue;
-
-                        if (names) {
-                                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_EMITS_INVALIDATION))
-                                                continue;
-
-                                        r = sd_bus_message_append(m, "s", *property);
-                                        if (r < 0)
-                                                return r;
-                                }
-                        } else {
-                                const sd_bus_vtable *v;
-
-                                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;
-
-                                        if (v->flags & SD_BUS_VTABLE_HIDDEN)
-                                                continue;
-
-                                        if (!(v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION))
-                                                continue;
-
-                                        r = sd_bus_message_append(m, "s", v->x.property.member);
-                                        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;
-}
-
-_public_ int sd_bus_emit_properties_changed_strv(
-                sd_bus *bus,
-                const char *path,
-                const char *interface,
-                char **names) {
-
-        BUS_DONT_DESTROY(bus);
-        bool found_interface = false;
-        char *prefix;
-        int r;
-
-        assert_return(bus, -EINVAL);
-        assert_return(object_path_is_valid(path), -EINVAL);
-        assert_return(interface_name_is_valid(interface), -EINVAL);
-        assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
-        assert_return(!bus_pid_changed(bus), -ECHILD);
-
-
-        /* A non-NULL but empty names list means nothing needs to be
-           generated. A NULL list OTOH indicates that all properties
-           that are set to EMITS_CHANGE or EMITS_INVALIDATION shall be
-           included in the PropertiesChanged message. */
-        if (names && names[0] == NULL)
-                return 0;
-
-        do {
-                bus->nodes_modified = false;
-
-                r = emit_properties_changed_on_interface(bus, path, path, interface, false, &found_interface, names);
-                if (r != 0)
-                        return r;
-                if (bus->nodes_modified)
-                        continue;
-
-                prefix = alloca(strlen(path) + 1);
-                OBJECT_PATH_FOREACH_PREFIX(prefix, path) {
-                        r = emit_properties_changed_on_interface(bus, prefix, path, interface, true, &found_interface, names);
-                        if (r != 0)
-                                return r;
-                        if (bus->nodes_modified)
-                                break;
-                }
-
-        } while (bus->nodes_modified);
-
-        return found_interface ? 0 : -ENOENT;
-}
-
-_public_ int sd_bus_emit_properties_changed(
-                sd_bus *bus,
-                const char *path,
-                const char *interface,
-                const char *name, ...)  {
-
-        char **names;
-
-        assert_return(bus, -EINVAL);
-        assert_return(object_path_is_valid(path), -EINVAL);
-        assert_return(interface_name_is_valid(interface), -EINVAL);
-        assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
-        assert_return(!bus_pid_changed(bus), -ECHILD);
-
-        if (!name)
-                return 0;
-
-        names = strv_from_stdarg_alloca(name);
-
-        return sd_bus_emit_properties_changed_strv(bus, path, interface, names);
-}
-
-static int interfaces_added_append_one_prefix(
-                sd_bus *bus,
-                sd_bus_message *m,
-                const char *prefix,
-                const char *path,
-                const char *interface,
-                bool require_fallback) {
-
-        _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
-        bool found_interface = false;
-        struct node_vtable *c;
-        struct node *n;
-        void *u = NULL;
-        int r;
-
-        assert(bus);
-        assert(m);
-        assert(prefix);
-        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))
-                        continue;
-
-                r = node_vtable_get_userdata(bus, path, c, &u, &error);
-                if (r < 0)
-                        return r;
-                if (bus->nodes_modified)
-                        return 0;
-                if (r == 0)
-                        continue;
-
-                if (!found_interface) {
-                        r = sd_bus_message_append_basic(m, 's', interface);
-                        if (r < 0)
-                                return r;
-
-                        r = sd_bus_message_open_container(m, 'a', "{sv}");
-                        if (r < 0)
-                                return r;
-
-                        found_interface = true;
-                }
-
-                r = vtable_append_all_properties(bus, m, path, c, u, &error);
-                if (r < 0)
-                        return r;
-                if (bus->nodes_modified)
-                        return 0;
-        }
-
-        if (found_interface) {
-                r = sd_bus_message_close_container(m);
-                if (r < 0)
-                        return r;
-        }
-
-        return found_interface;
-}
-
-static int interfaces_added_append_one(
-                sd_bus *bus,
-                sd_bus_message *m,
-                const char *path,
-                const char *interface) {
-
-        char *prefix;
-        int r;
-
-        assert(bus);
-        assert(m);
-        assert(path);
-        assert(interface);
-
-        r = interfaces_added_append_one_prefix(bus, m, path, path, interface, false);
-        if (r != 0)
-                return r;
-        if (bus->nodes_modified)
-                return 0;
-
-        prefix = alloca(strlen(path) + 1);
-        OBJECT_PATH_FOREACH_PREFIX(prefix, path) {
-                r = interfaces_added_append_one_prefix(bus, m, prefix, path, interface, true);
-                if (r != 0)
-                        return r;
-                if (bus->nodes_modified)
-                        return 0;
-        }
-
-        return -ENOENT;
-}
-
-_public_ int sd_bus_emit_interfaces_added_strv(sd_bus *bus, const char *path, char **interfaces) {
-        BUS_DONT_DESTROY(bus);
-
-        _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
-        char **i;
-        int r;
-
-        assert_return(bus, -EINVAL);
-        assert_return(object_path_is_valid(path), -EINVAL);
-        assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
-        assert_return(!bus_pid_changed(bus), -ECHILD);
-
-        if (strv_isempty(interfaces))
-                return 0;
-
-        do {
-                bus->nodes_modified = false;
-
-                if (m)
-                        m = sd_bus_message_unref(m);
-
-                r = sd_bus_message_new_signal(bus, path, "org.freedesktop.DBus.ObjectManager", "InterfacesAdded", &m);
-                if (r < 0)
-                        return r;
-
-                r = sd_bus_message_append_basic(m, 'o', path);
-                if (r < 0)
-                        return r;
-
-                r = sd_bus_message_open_container(m, 'a', "{sa{sv}}");
-                if (r < 0)
-                        return r;
-
-                STRV_FOREACH(i, interfaces) {
-                        assert_return(interface_name_is_valid(*i), -EINVAL);
-
-                        r = sd_bus_message_open_container(m, 'e', "sa{sv}");
-                        if (r < 0)
-                                return r;
-
-                        r = interfaces_added_append_one(bus, m, path, *i);
-                        if (r < 0)
-                                return r;
-
-                        if (bus->nodes_modified)
-                                break;
-
-                        r = sd_bus_message_close_container(m);
-                        if (r < 0)
-                                return r;
-                }
-
-                if (bus->nodes_modified)
-                        continue;
-
-                r = sd_bus_message_close_container(m);
-                if (r < 0)
-                        return r;
-
-        } while (bus->nodes_modified);
-
-        return sd_bus_send(bus, m, NULL);
-}
-
-_public_ int sd_bus_emit_interfaces_added(sd_bus *bus, const char *path, const char *interface, ...) {
-        char **interfaces;
-
-        assert_return(bus, -EINVAL);
-        assert_return(object_path_is_valid(path), -EINVAL);
-        assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
-        assert_return(!bus_pid_changed(bus), -ECHILD);
-
-        interfaces = strv_from_stdarg_alloca(interface);
-
-        return sd_bus_emit_interfaces_added_strv(bus, path, interfaces);
-}
-
-_public_ int sd_bus_emit_interfaces_removed_strv(sd_bus *bus, const char *path, char **interfaces) {
-        _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
-        int r;
-
-        assert_return(bus, -EINVAL);
-        assert_return(object_path_is_valid(path), -EINVAL);
-        assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
-        assert_return(!bus_pid_changed(bus), -ECHILD);
-
-        if (strv_isempty(interfaces))
-                return 0;
-
-        r = sd_bus_message_new_signal(bus, path, "org.freedesktop.DBus.ObjectManager", "InterfacesRemoved", &m);
-        if (r < 0)
-                return r;
-
-        r = sd_bus_message_append_basic(m, 'o', path);
-        if (r < 0)
-                return r;
-
-        r = sd_bus_message_append_strv(m, interfaces);
-        if (r < 0)
-                return r;
-
-        return sd_bus_send(bus, m, NULL);
-}
-
-_public_ int sd_bus_emit_interfaces_removed(sd_bus *bus, const char *path, const char *interface, ...) {
-        char **interfaces;
-
-        assert_return(bus, -EINVAL);
-        assert_return(object_path_is_valid(path), -EINVAL);
-        assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
-        assert_return(!bus_pid_changed(bus), -ECHILD);
-
-        interfaces = strv_from_stdarg_alloca(interface);
-
-        return sd_bus_emit_interfaces_removed_strv(bus, path, interfaces);
-}
-
-_public_ int sd_bus_add_object_manager(sd_bus *bus, const char *path) {
-        struct node *n;
-
-        assert_return(bus, -EINVAL);
-        assert_return(object_path_is_valid(path), -EINVAL);
-        assert_return(!bus_pid_changed(bus), -ECHILD);
-
-        n = bus_node_allocate(bus, path);
-        if (!n)
-                return -ENOMEM;
-
-        n->object_manager = true;
-        bus->nodes_modified = true;
-        return 0;
-}
-
-_public_ int sd_bus_remove_object_manager(sd_bus *bus, const char *path) {
-        struct node *n;
-
-        assert_return(bus, -EINVAL);
-        assert_return(object_path_is_valid(path), -EINVAL);
-        assert_return(!bus_pid_changed(bus), -ECHILD);
-
-        n = hashmap_get(bus->nodes, path);
-        if (!n)
-                return 0;
-
-        if (!n->object_manager)
-                return 0;
-
-        n->object_manager = false;
-        bus->nodes_modified = true;
-        bus_node_gc(bus, n);
-
-        return 1;
-}