diff options
| -rw-r--r-- | Makefile.am | 3 | ||||
| -rw-r--r-- | src/libsystemd-bus/bus-convenience.c | 280 | ||||
| -rw-r--r-- | src/libsystemd-bus/bus-objects.c | 1937 | ||||
| -rw-r--r-- | src/libsystemd-bus/bus-objects.h | 26 | ||||
| -rw-r--r-- | src/libsystemd-bus/sd-bus.c | 2172 |
5 files changed, 2248 insertions, 2170 deletions
diff --git a/Makefile.am b/Makefile.am index 12c7d7cacf..e5cd7a5ed8 100644 --- a/Makefile.am +++ b/Makefile.am @@ -1966,6 +1966,9 @@ libsystemd_bus_la_SOURCES = \ src/libsystemd-bus/bus-bloom.h \ src/libsystemd-bus/bus-introspect.c \ src/libsystemd-bus/bus-introspect.h \ + src/libsystemd-bus/bus-objects.c \ + src/libsystemd-bus/bus-objects.h \ + src/libsystemd-bus/bus-convenience.c \ src/libsystemd-bus/kdbus.h \ src/libsystemd-bus/sd-memfd.c \ src/libsystemd-bus/sd-event.c diff --git a/src/libsystemd-bus/bus-convenience.c b/src/libsystemd-bus/bus-convenience.c new file mode 100644 index 0000000000..3d223c03a8 --- /dev/null +++ b/src/libsystemd-bus/bus-convenience.c @@ -0,0 +1,280 @@ +/*-*- 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 "bus-internal.h" +#include "bus-message.h" +#include "bus-signature.h" + +int sd_bus_emit_signal( + sd_bus *bus, + const char *path, + const char *interface, + const char *member, + const char *types, ...) { + + _cleanup_bus_message_unref_ sd_bus_message *m = NULL; + int r; + + if (!bus) + return -EINVAL; + if (!BUS_IS_OPEN(bus->state)) + return -ENOTCONN; + if (bus_pid_changed(bus)) + return -ECHILD; + + r = sd_bus_message_new_signal(bus, path, interface, member, &m); + if (r < 0) + return r; + + if (!isempty(types)) { + va_list ap; + + va_start(ap, types); + r = bus_message_append_ap(m, types, ap); + va_end(ap); + if (r < 0) + return r; + } + + return sd_bus_send(bus, m, NULL); +} + +int sd_bus_call_method( + sd_bus *bus, + const char *destination, + const char *path, + const char *interface, + const char *member, + sd_bus_error *error, + sd_bus_message **reply, + const char *types, ...) { + + _cleanup_bus_message_unref_ sd_bus_message *m = NULL; + int r; + + if (!bus) + + return -EINVAL; + if (!BUS_IS_OPEN(bus->state)) + return -ENOTCONN; + if (bus_pid_changed(bus)) + return -ECHILD; + + r = sd_bus_message_new_method_call(bus, destination, path, interface, member, &m); + if (r < 0) + return r; + + if (!isempty(types)) { + va_list ap; + + va_start(ap, types); + r = bus_message_append_ap(m, types, ap); + va_end(ap); + if (r < 0) + return r; + } + + return sd_bus_send_with_reply_and_block(bus, m, 0, error, reply); +} + +int sd_bus_reply_method_return( + sd_bus *bus, + sd_bus_message *call, + const char *types, ...) { + + _cleanup_bus_message_unref_ sd_bus_message *m = NULL; + int r; + + if (!bus) + return -EINVAL; + if (!call) + return -EINVAL; + if (!call->sealed) + return -EPERM; + if (call->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL) + return -EINVAL; + if (!BUS_IS_OPEN(bus->state)) + return -ENOTCONN; + if (bus_pid_changed(bus)) + return -ECHILD; + + if (call->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED) + return 0; + + r = sd_bus_message_new_method_return(bus, call, &m); + if (r < 0) + return r; + + if (!isempty(types)) { + va_list ap; + + va_start(ap, types); + r = bus_message_append_ap(m, types, ap); + va_end(ap); + if (r < 0) + return r; + } + + return sd_bus_send(bus, m, NULL); +} + +int sd_bus_reply_method_error( + sd_bus *bus, + sd_bus_message *call, + const sd_bus_error *e) { + + _cleanup_bus_message_unref_ sd_bus_message *m = NULL; + int r; + + if (!bus) + return -EINVAL; + if (!call) + return -EINVAL; + if (!call->sealed) + return -EPERM; + if (call->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL) + return -EINVAL; + if (!sd_bus_error_is_set(e)) + return -EINVAL; + if (!BUS_IS_OPEN(bus->state)) + return -ENOTCONN; + if (bus_pid_changed(bus)) + return -ECHILD; + + if (call->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED) + return 0; + + r = sd_bus_message_new_method_error(bus, call, e, &m); + if (r < 0) + return r; + + return sd_bus_send(bus, m, NULL); +} + +int sd_bus_reply_method_errorf( + sd_bus *bus, + sd_bus_message *call, + const char *name, + const char *format, + ...) { + + _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; + va_list ap; + int r; + + error.name = strdup(name); + if (!error.name) + return -ENOMEM; + + error.need_free = true; + + if (format) { + va_start(ap, format); + r = vasprintf((char**) &error.message, format, ap); + va_end(ap); + + if (r < 0) + return -ENOMEM; + } + + return sd_bus_reply_method_error(bus, call, &error); +} + +int sd_bus_get_property( + sd_bus *bus, + const char *destination, + const char *path, + const char *interface, + const char *member, + sd_bus_error *error, + sd_bus_message **reply, + const char *type) { + + sd_bus_message *rep = NULL; + int r; + + if (interface && !interface_name_is_valid(interface)) + return -EINVAL; + if (!member_name_is_valid(member)) + return -EINVAL; + if (!signature_is_single(type, false)) + return -EINVAL; + if (!reply) + return -EINVAL; + + r = sd_bus_call_method(bus, destination, path, "org.freedesktop.DBus.Properties", "Get", error, &rep, "ss", strempty(interface), member); + if (r < 0) + return r; + + r = sd_bus_message_enter_container(rep, 'v', type); + if (r < 0) { + sd_bus_message_unref(rep); + return r; + } + + *reply = rep; + return 0; +} + +int sd_bus_set_property( + sd_bus *bus, + const char *destination, + const char *path, + const char *interface, + const char *member, + sd_bus_error *error, + const char *type, ...) { + + _cleanup_bus_message_unref_ sd_bus_message *m = NULL; + va_list ap; + int r; + + if (interface && !interface_name_is_valid(interface)) + return -EINVAL; + if (!member_name_is_valid(member)) + return -EINVAL; + if (!signature_is_single(type, false)) + return -EINVAL; + + r = sd_bus_message_new_method_call(bus, destination, path, "org.freedesktop.DBus.Properties", "Set", &m); + if (r < 0) + return r; + + r = sd_bus_message_append(m, "ss", strempty(interface), member); + if (r < 0) + return r; + + r = sd_bus_message_open_container(m, 'v', type); + if (r < 0) + return r; + + va_start(ap, type); + r = bus_message_append_ap(m, type, ap); + va_end(ap); + if (r < 0) + return r; + + r = sd_bus_message_close_container(m); + if (r < 0) + return r; + + return sd_bus_send_with_reply_and_block(bus, m, 0, error, NULL); +} 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; +} diff --git a/src/libsystemd-bus/bus-objects.h b/src/libsystemd-bus/bus-objects.h new file mode 100644 index 0000000000..420edd9478 --- /dev/null +++ b/src/libsystemd-bus/bus-objects.h @@ -0,0 +1,26 @@ +/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ + +#pragma once + +/*** + 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 "bus-internal.h" + +int bus_process_object(sd_bus *bus, sd_bus_message *m); diff --git a/src/libsystemd-bus/sd-bus.c b/src/libsystemd-bus/sd-bus.c index cebb07319a..ca687c0a65 100644 --- a/src/libsystemd-bus/sd-bus.c +++ b/src/libsystemd-bus/sd-bus.c @@ -44,6 +44,7 @@ #include "bus-control.h" #include "bus-introspect.h" #include "bus-signature.h" +#include "bus-objects.h" static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec); @@ -1875,1103 +1876,6 @@ static int process_builtin(sd_bus *bus, sd_bus_message *m) { return 1; } -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; -} - -static int 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 int process_message(sd_bus *bus, sd_bus_message *m) { int r; @@ -3000,7 +1904,7 @@ static int process_message(sd_bus *bus, sd_bus_message *m) { if (r != 0) return r; - return process_object(bus, m); + return bus_process_object(bus, m); } static int process_running(sd_bus *bus, sd_bus_message **ret) { @@ -3249,183 +2153,6 @@ int sd_bus_remove_filter(sd_bus *bus, sd_bus_message_handler_t callback, void *u return 0; } -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); -} - int sd_bus_add_match(sd_bus *bus, const char *match, sd_bus_message_handler_t callback, void *userdata) { struct bus_match_component *components = NULL; unsigned n_components = 0; @@ -3491,186 +2218,6 @@ int sd_bus_remove_match(sd_bus *bus, const char *match, sd_bus_message_handler_t return r < 0 ? r : q; } -int sd_bus_emit_signal( - sd_bus *bus, - const char *path, - const char *interface, - const char *member, - const char *types, ...) { - - _cleanup_bus_message_unref_ sd_bus_message *m = NULL; - int r; - - if (!bus) - return -EINVAL; - if (!BUS_IS_OPEN(bus->state)) - return -ENOTCONN; - if (bus_pid_changed(bus)) - return -ECHILD; - - r = sd_bus_message_new_signal(bus, path, interface, member, &m); - if (r < 0) - return r; - - if (!isempty(types)) { - va_list ap; - - va_start(ap, types); - r = bus_message_append_ap(m, types, ap); - va_end(ap); - if (r < 0) - return r; - } - - return sd_bus_send(bus, m, NULL); -} - -int sd_bus_call_method( - sd_bus *bus, - const char *destination, - const char *path, - const char *interface, - const char *member, - sd_bus_error *error, - sd_bus_message **reply, - const char *types, ...) { - - _cleanup_bus_message_unref_ sd_bus_message *m = NULL; - int r; - - if (!bus) - - return -EINVAL; - if (!BUS_IS_OPEN(bus->state)) - return -ENOTCONN; - if (bus_pid_changed(bus)) - return -ECHILD; - - r = sd_bus_message_new_method_call(bus, destination, path, interface, member, &m); - if (r < 0) - return r; - - if (!isempty(types)) { - va_list ap; - - va_start(ap, types); - r = bus_message_append_ap(m, types, ap); - va_end(ap); - if (r < 0) - return r; - } - - return sd_bus_send_with_reply_and_block(bus, m, 0, error, reply); -} - -int sd_bus_reply_method_return( - sd_bus *bus, - sd_bus_message *call, - const char *types, ...) { - - _cleanup_bus_message_unref_ sd_bus_message *m = NULL; - int r; - - if (!bus) - return -EINVAL; - if (!call) - return -EINVAL; - if (!call->sealed) - return -EPERM; - if (call->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL) - return -EINVAL; - if (!BUS_IS_OPEN(bus->state)) - return -ENOTCONN; - if (bus_pid_changed(bus)) - return -ECHILD; - - if (call->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED) - return 0; - - r = sd_bus_message_new_method_return(bus, call, &m); - if (r < 0) - return r; - - if (!isempty(types)) { - va_list ap; - - va_start(ap, types); - r = bus_message_append_ap(m, types, ap); - va_end(ap); - if (r < 0) - return r; - } - - return sd_bus_send(bus, m, NULL); -} - -int sd_bus_reply_method_error( - sd_bus *bus, - sd_bus_message *call, - const sd_bus_error *e) { - - _cleanup_bus_message_unref_ sd_bus_message *m = NULL; - int r; - - if (!bus) - return -EINVAL; - if (!call) - return -EINVAL; - if (!call->sealed) - return -EPERM; - if (call->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL) - return -EINVAL; - if (!sd_bus_error_is_set(e)) - return -EINVAL; - if (!BUS_IS_OPEN(bus->state)) - return -ENOTCONN; - if (bus_pid_changed(bus)) - return -ECHILD; - - if (call->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED) - return 0; - - r = sd_bus_message_new_method_error(bus, call, e, &m); - if (r < 0) - return r; - - return sd_bus_send(bus, m, NULL); -} - -int sd_bus_reply_method_errorf( - sd_bus *bus, - sd_bus_message *call, - const char *name, - const char *format, - ...) { - - _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; - char *n, *m; - va_list ap; - int r; - - n = strdup(name); - if (!n) - return -ENOMEM; - - if (format) { - va_start(ap, format); - r = vasprintf(&m, format, ap); - va_end(ap); - - if (r < 0) { - free(n); - return -ENOMEM; - } - } - - error.name = n; - error.message = m; - error.need_free = true; - - return sd_bus_reply_method_error(bus, call, &error); -} - bool bus_pid_changed(sd_bus *bus) { assert(bus); @@ -3679,718 +2226,3 @@ bool bus_pid_changed(sd_bus *bus) { return bus->original_pid != getpid(); } - -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_get_property( - sd_bus *bus, - const char *destination, - const char *path, - const char *interface, - const char *member, - sd_bus_error *error, - sd_bus_message **reply, - const char *type) { - - sd_bus_message *rep = NULL; - int r; - - if (interface && !interface_name_is_valid(interface)) - return -EINVAL; - if (!member_name_is_valid(member)) - return -EINVAL; - if (!signature_is_single(type, false)) - return -EINVAL; - if (!reply) - return -EINVAL; - - r = sd_bus_call_method(bus, destination, path, "org.freedesktop.DBus.Properties", "Get", error, &rep, "ss", strempty(interface), member); - if (r < 0) - return r; - - r = sd_bus_message_enter_container(rep, 'v', type); - if (r < 0) { - sd_bus_message_unref(rep); - return r; - } - - *reply = rep; - return 0; -} - -int sd_bus_set_property( - sd_bus *bus, - const char *destination, - const char *path, - const char *interface, - const char *member, - sd_bus_error *error, - const char *type, ...) { - - _cleanup_bus_message_unref_ sd_bus_message *m = NULL; - va_list ap; - int r; - - if (interface && !interface_name_is_valid(interface)) - return -EINVAL; - if (!member_name_is_valid(member)) - return -EINVAL; - if (!signature_is_single(type, false)) - return -EINVAL; - - r = sd_bus_message_new_method_call(bus, destination, path, "org.freedesktop.DBus.Properties", "Set", &m); - if (r < 0) - return r; - - r = sd_bus_message_append(m, "ss", strempty(interface), member); - if (r < 0) - return r; - - r = sd_bus_message_open_container(m, 'v', type); - if (r < 0) - return r; - - va_start(ap, type); - r = bus_message_append_ap(m, type, ap); - va_end(ap); - if (r < 0) - return r; - - r = sd_bus_message_close_container(m); - if (r < 0) - return r; - - return sd_bus_send_with_reply_and_block(bus, m, 0, error, NULL); -} - -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; -} |