/***
This file is part of systemd.
Copyright 2013 Lennart Poettering
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 "alloc-util.h"
#include "bus-internal.h"
#include "bus-introspect.h"
#include "bus-message.h"
#include "bus-objects.h"
#include "bus-signature.h"
#include "bus-slot.h"
#include "bus-type.h"
#include "bus-util.h"
#include "set.h"
#include "string-util.h"
#include "strv.h"
static int node_vtable_get_userdata(
const char *path,
struct node_vtable *c,
void **userdata,
sd_bus_error *error) {
sd_bus_slot *s;
void *u;
int r;
assert(c);
u = s->userdata;
if (c->find) {
bus->current_userdata = u;
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;
}
assert(p);
}
assert(p);
}
static int vtable_property_get_userdata(
const char *path,
struct vtable_member *p,
void **userdata,
sd_bus_error *error) {
void *u;
int r;
assert(p);
if (r <= 0)
return r;
if (bus->nodes_modified)
return 0;
return 1;
}
static int add_enumerated_to_set(
const char *prefix,
struct node_enumerator *first,
Set *s,
sd_bus_error *error) {
struct node_enumerator *c;
int r;
assert(s);
if (bus->nodes_modified)
return 0;
if (r < 0)
return r;
if (sd_bus_error_is_set(error))
return -sd_bus_error_get_errno(error);
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;
}
if (r < 0)
return r;
}
return 0;
}
enum {
/* if set, add_subtree() works recursively */
/* if set, add_subtree() scans object-manager hierarchies recursively */
};
static int add_subtree_to_set(
const char *prefix,
struct node *n,
unsigned int flags,
Set *s,
sd_bus_error *error) {
struct node *i;
int r;
assert(n);
assert(s);
if (r < 0)
return r;
if (bus->nodes_modified)
return 0;
char *t;
continue;
if (!t)
return -ENOMEM;
r = set_consume(s, t);
if (r < 0 && r != -EEXIST)
return r;
if ((flags & CHILDREN_RECURSIVE) &&
if (r < 0)
return r;
if (bus->nodes_modified)
return 0;
}
}
return 0;
}
static int get_child_nodes(
const char *prefix,
struct node *n,
unsigned int flags,
sd_bus_error *error) {
int r;
assert(n);
s = set_new(&string_hash_ops);
if (!s)
return -ENOMEM;
if (r < 0) {
set_free_free(s);
return r;
}
*_s = s;
return 0;
}
static int node_callbacks_run(
sd_bus_message *m,
struct node_callback *first,
bool require_fallback,
bool *found_object) {
struct node_callback *c;
int r;
assert(m);
if (bus->nodes_modified)
return 0;
if (require_fallback && !c->is_fallback)
continue;
*found_object = true;
continue;
r = sd_bus_message_rewind(m, true);
if (r < 0)
return r;
r = bus_maybe_reply_error(m, r, &error_buffer);
if (r != 0)
return r;
}
return 0;
}
static int check_access(sd_bus *bus, sd_bus_message *m, struct vtable_member *c, sd_bus_error *error) {
int r;
assert(m);
assert(c);
/* If the entire bus is trusted let's grant access */
return 0;
/* If the member is marked UNPRIVILEGED let's grant access */
return 0;
/* 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". */
if (cap == 0)
if (cap == 0)
cap = CAP_SYS_ADMIN;
else
cap --;
r = sd_bus_query_sender_privilege(m, cap);
if (r < 0)
return r;
if (r > 0)
return 0;
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_message *m,
struct vtable_member *c,
bool require_fallback,
bool *found_object) {
const char *signature;
void *u;
int r;
assert(m);
assert(c);
return 0;
if (r < 0)
return bus_maybe_reply_error(m, r, &error);
if (r <= 0)
return bus_maybe_reply_error(m, r, &error);
if (bus->nodes_modified)
return 0;
u = vtable_method_convert_userdata(c->vtable, u);
*found_object = true;
return 0;
r = sd_bus_message_rewind(m, true);
if (r < 0)
return r;
signature = sd_bus_message_get_signature(m, true);
if (!signature)
return -EINVAL;
return sd_bus_reply_method_errorf(
m,
"Invalid arguments '%s' to call %s.%s(), expecting '%s'.",
/* Keep track what the signature of the reply to this message
* should be, so that this can be enforced when sealing the
* reply. */
bus->current_userdata = u;
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(
const sd_bus_vtable *v,
const char *path,
const char *interface,
const char *property,
void *userdata,
sd_bus_error *error) {
const void *p;
int r;
assert(v);
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. */
case SD_BUS_TYPE_STRING:
case SD_BUS_TYPE_SIGNATURE:
break;
case SD_BUS_TYPE_OBJECT_PATH:
p = *(char**) userdata;
assert(p);
break;
default:
p = userdata;
break;
}
}
static int invoke_property_set(
const sd_bus_vtable *v,
const char *path,
const char *interface,
const char *property,
void *userdata,
sd_bus_error *error) {
int r;
assert(v);
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. */
case SD_BUS_TYPE_STRING:
case SD_BUS_TYPE_OBJECT_PATH:
case SD_BUS_TYPE_SIGNATURE: {
const char *p;
char *n;
if (r < 0)
return r;
n = strdup(p);
if (!n)
return -ENOMEM;
*(char**) userdata = n;
break;
}
default:
if (r < 0)
return r;
break;
}
return 1;
}
static int property_get_set_callbacks_run(
sd_bus_message *m,
struct vtable_member *c,
bool require_fallback,
bool is_get,
bool *found_object) {
void *u = NULL;
int r;
assert(m);
assert(c);
return 0;
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. */
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. */
if (r < 0)
return bus_maybe_reply_error(m, r, &error);
if (bus->nodes_modified)
return 0;
if (r < 0)
return r;
} else {
char type = 0;
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. */
return 0;
if (r < 0)
return r;
return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INVALID_ARGS, "Incorrect parameters for property '%s', expected '%s', got '%s'.", c->member, strempty(c->vtable->x.property.signature), strempty(signature));
if (r < 0)
return r;
if (r < 0)
return bus_maybe_reply_error(m, r, &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;
}
if (r < 0)
return r;
return 1;
}
static int vtable_append_one_property(
const char *path,
struct node_vtable *c,
const sd_bus_vtable *v,
void *userdata,
sd_bus_error *error) {
int r;
assert(c);
assert(v);
if (r < 0)
return r;
if (r < 0)
return r;
if (r < 0)
return r;
r = invoke_property_get(bus, slot, 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;
if (r < 0)
return r;
if (r < 0)
return r;
return 0;
}
static int vtable_append_all_properties(
const char *path,
struct node_vtable *c,
void *userdata,
sd_bus_error *error) {
const sd_bus_vtable *v;
int r;
assert(c);
return 1;
continue;
if (v->flags & SD_BUS_VTABLE_HIDDEN)
continue;
if (v->flags & SD_BUS_VTABLE_PROPERTY_EXPLICIT)
continue;
if (r < 0)
return r;
if (bus->nodes_modified)
return 0;
}
return 1;
}
static int property_get_all_callbacks_run(
sd_bus_message *m,
struct node_vtable *first,
bool require_fallback,
const char *iface,
bool *found_object) {
struct node_vtable *c;
bool found_interface;
int r;
assert(m);
r = sd_bus_message_new_method_return(m, &reply);
if (r < 0)
return r;
if (r < 0)
return r;
found_interface = !iface ||
void *u;
if (require_fallback && !c->is_fallback)
continue;
if (r < 0)
return bus_maybe_reply_error(m, r, &error);
if (bus->nodes_modified)
return 0;
if (r == 0)
continue;
*found_object = true;
continue;
found_interface = true;
if (r < 0)
return bus_maybe_reply_error(m, r, &error);
if (bus->nodes_modified)
return 0;
}
if (!found_interface) {
m,
"Unknown interface '%s'.", iface);
if (r < 0)
return r;
return 1;
}
if (r < 0)
return r;
if (r < 0)
return r;
return 1;
}
static int bus_node_exists(
struct node *n,
const char *path,
bool require_fallback) {
struct node_vtable *c;
struct node_callback *k;
int r;
assert(n);
/* Tests if there's anything attached directly to this node
* for the specified path */
return true;
if (require_fallback && !k->is_fallback)
continue;
return 1;
}
if (require_fallback && !c->is_fallback)
continue;
if (r != 0)
return r;
if (bus->nodes_modified)
return 0;
}
return 0;
}
static int process_introspect(
sd_bus_message *m,
struct node *n,
bool require_fallback,
bool *found_object) {
struct node_vtable *c;
bool empty;
int r;
assert(m);
assert(n);
if (r < 0)
return bus_maybe_reply_error(m, r, &error);
if (bus->nodes_modified)
return 0;
if (r < 0)
return r;
if (r < 0)
return r;
empty = set_isempty(s);
if (require_fallback && !c->is_fallback)
continue;
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;
continue;
if (previous_interface)
}
if (r < 0)
goto finish;
previous_interface = c->interface;
}
if (previous_interface)
if (empty) {
/* Nothing?, let's see if we exist at all, and if not
* refuse to do anything */
if (r <= 0)
goto finish;
if (bus->nodes_modified) {
r = 0;
goto finish;
}
}
*found_object = true;
if (r < 0)
goto finish;
if (r < 0)
goto finish;
if (r < 0)
goto finish;
r = 1;
return r;
}
static int object_manager_serialize_path(
const char *prefix,
const char *path,
bool require_fallback,
sd_bus_error *error) {
bool found_something = false;
struct node_vtable *i;
struct node *n;
int r;
if (!n)
return 0;
void *u;
if (require_fallback && !i->is_fallback)
continue;
if (r < 0)
return r;
if (bus->nodes_modified)
return 0;
if (r == 0)
continue;
if (!found_something) {
/* Open the object part */
if (r < 0)
return r;
if (r < 0)
return r;
if (r < 0)
return r;
found_something = true;
}
/* Maybe close the previous interface part */
if (previous_interface) {
if (r < 0)
return r;
if (r < 0)
return r;
}
/* Open the new interface part */
if (r < 0)
return r;
if (r < 0)
return r;
if (r < 0)
return r;
}
if (r < 0)
return r;
if (bus->nodes_modified)
return 0;
previous_interface = i->interface;
}
if (previous_interface) {
if (r < 0)
return r;
if (r < 0)
return r;
}
if (found_something) {
if (r < 0)
return r;
if (r < 0)
return r;
}
return 1;
}
static int object_manager_serialize_path_and_fallbacks(
const char *path,
sd_bus_error *error) {
char *prefix;
int r;
/* First, add all vtables registered for this path */
if (r < 0)
return r;
if (bus->nodes_modified)
return 0;
/* Second, add fallback vtables registered for any of the prefixes */
if (r < 0)
return r;
if (bus->nodes_modified)
return 0;
}
return 0;
}
static int process_get_managed_objects(
sd_bus_message *m,
struct node *n,
bool require_fallback,
bool *found_object) {
Iterator i;
char *path;
int r;
assert(m);
assert(n);
/* Spec says, GetManagedObjects() is only implemented on the root of a
* sub-tree. Therefore, we require a registered object-manager on
* exactly the queried path, otherwise, we refuse to respond. */
if (require_fallback || !n->object_managers)
return 0;
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;
if (r < 0)
return r;
if (r < 0)
return r;
if (bus->nodes_modified)
return 0;
}
if (r < 0)
return r;
if (r < 0)
return r;
return 1;
}
static int object_find_and_run(
sd_bus_message *m,
const char *p,
bool require_fallback,
bool *found_object) {
struct node *n;
int r;
assert(m);
assert(p);
if (!n)
return 0;
/* First, try object callbacks */
if (r != 0)
return r;
if (bus->nodes_modified)
return 0;
return 0;
/* Then, look for a known method */
vtable_key.path = (char*) p;
if (v) {
if (r != 0)
return r;
if (bus->nodes_modified)
return 0;
}
/* Then, look for a known property */
bool get = false;
r = sd_bus_message_rewind(m, true);
if (r < 0)
return r;
vtable_key.path = (char*) p;
if (r < 0)
return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INVALID_ARGS, "Expected interface and member parameters");
if (v) {
if (r != 0)
return r;
}
const char *iface;
r = sd_bus_message_rewind(m, true);
if (r < 0)
return r;
if (r < 0)
if (iface[0] == 0)
if (r != 0)
return r;
}
if (!isempty(sd_bus_message_get_signature(m, true)))
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)))
if (r != 0)
return r;
}
if (bus->nodes_modified)
return 0;
if (!*found_object) {
if (r < 0)
return r;
if (bus->nodes_modified)
return 0;
if (r > 0)
*found_object = true;
}
return 0;
}
int r;
bool found_object = false;
assert(m);
return 0;
return 0;
return 0;
/* Never respond to broadcast messages */
return 0;
do {
bus->nodes_modified = false;
if (r != 0)
return r;
/* Look for fallback prefixes */
if (bus->nodes_modified)
break;
if (r != 0)
return r;
}
} while (bus->nodes_modified);
if (!found_object)
return 0;
m,
"Unknown property or interface.");
else
m,
if (r < 0)
return r;
return 1;
}
const char *e;
_cleanup_free_ char *s = NULL;
char *p;
int r;
if (n)
return n;
if (r < 0)
return NULL;
if (!s)
return NULL;
else {
assert(e);
if (!parent)
return NULL;
}
if (!n)
return NULL;
n->path = s;
s = NULL; /* do not free */
if (r < 0) {
free(n);
return NULL;
}
if (parent)
return n;
}
assert(b);
if (!n)
return;
if (n->child ||
n->callbacks ||
n->vtables ||
n->enumerators ||
n->object_managers)
return;
if (n->parent)
bus_node_gc(b, n->parent);
free(n);
}
struct node *n;
if (!n) {
char *prefix;
if (n)
break;
}
}
while (n && !n->object_managers)
n = n->parent;
if (out)
*out = n;
return !!n;
}
static int bus_add_object(
sd_bus_slot **slot,
bool fallback,
const char *path,
void *userdata) {
sd_bus_slot *s;
struct node *n;
int r;
if (!n)
return -ENOMEM;
if (!s) {
r = -ENOMEM;
goto fail;
}
s->node_callback.node = n;
bus->nodes_modified = true;
if (slot)
*slot = s;
return 0;
fail:
bus_node_gc(bus, n);
return r;
}
sd_bus_slot **slot,
const char *path,
void *userdata) {
}
sd_bus_slot **slot,
const char *prefix,
void *userdata) {
}
const struct vtable_member *m = a;
assert(m);
}
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);
if (r != 0)
return r;
if (r != 0)
return r;
}
};
static int add_object_vtable_internal(
sd_bus_slot **slot,
const char *path,
const char *interface,
const sd_bus_vtable *vtable,
bool fallback,
void *userdata) {
sd_bus_slot *s = NULL;
const sd_bus_vtable *v;
struct node *n;
int r;
if (r < 0)
return r;
if (r < 0)
return r;
if (!n)
return -ENOMEM;
if (i->is_fallback != fallback) {
r = -EPROTOTYPE;
goto fail;
}
r = -EEXIST;
goto fail;
}
existing = i;
}
}
if (!s) {
r = -ENOMEM;
goto fail;
}
if (!s->node_vtable.interface) {
r = -ENOMEM;
goto fail;
}
switch (v->type) {
case _SD_BUS_VTABLE_METHOD: {
struct vtable_member *m;
v->flags & (SD_BUS_VTABLE_PROPERTY_CONST|SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE|SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION)) {
r = -EINVAL;
goto fail;
}
if (!m) {
r = -ENOMEM;
goto fail;
}
m->parent = &s->node_vtable;
m->vtable = v;
if (r < 0) {
free(m);
goto fail;
}
break;
}
r = -EINVAL;
goto fail;
}
if (v->flags & SD_BUS_VTABLE_PROPERTY_CONST) {
r = -EINVAL;
goto fail;
}
/* Fall through */
case _SD_BUS_VTABLE_PROPERTY: {
struct vtable_member *m;
!(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_PROPERTY_EMITS_CHANGE) && (v->flags & SD_BUS_VTABLE_PROPERTY_EXPLICIT)) ||
r = -EINVAL;
goto fail;
}
if (!m) {
r = -ENOMEM;
goto fail;
}
m->parent = &s->node_vtable;
m->vtable = v;
if (r < 0) {
free(m);
goto fail;
}
break;
}
case _SD_BUS_VTABLE_SIGNAL:
v->flags & SD_BUS_VTABLE_UNPRIVILEGED) {
r = -EINVAL;
goto fail;
}
break;
default:
r = -EINVAL;
goto fail;
}
}
s->node_vtable.node = n;
bus->nodes_modified = true;
if (slot)
*slot = s;
return 0;
fail:
bus_node_gc(bus, n);
return r;
}
sd_bus_slot **slot,
const char *path,
const char *interface,
const sd_bus_vtable *vtable,
void *userdata) {
}
sd_bus_slot **slot,
const char *prefix,
const char *interface,
const sd_bus_vtable *vtable,
void *userdata) {
}
sd_bus_slot **slot,
const char *path,
void *userdata) {
sd_bus_slot *s;
struct node *n;
int r;
if (!n)
return -ENOMEM;
if (!s) {
r = -ENOMEM;
goto fail;
}
s->node_enumerator.node = n;
bus->nodes_modified = true;
if (slot)
*slot = s;
return 0;
fail:
bus_node_gc(bus, n);
return r;
}
static int emit_properties_changed_on_interface(
const char *prefix,
const char *path,
const char *interface,
bool require_fallback,
bool *found_interface,
char **names) {
struct node_vtable *c;
struct node *n;
char **property;
void *u = NULL;
int r;
if (!n)
return 0;
r = sd_bus_message_new_signal(bus, &m, path, "org.freedesktop.DBus.Properties", "PropertiesChanged");
if (r < 0)
return r;
if (r < 0)
return r;
if (r < 0)
return r;
if (require_fallback && !c->is_fallback)
continue;
continue;
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 */
struct vtable_member *v;
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;
has_invalidating = true;
continue;
}
has_changing = true;
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. */
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;
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;
if (r < 0)
return r;
if (has_invalidating) {
if (require_fallback && !c->is_fallback)
continue;
continue;
if (r < 0)
return r;
if (bus->nodes_modified)
return 0;
if (r == 0)
continue;
if (names) {
struct vtable_member *v;
continue;
if (r < 0)
return r;
}
} else {
const sd_bus_vtable *v;
continue;
if (v->flags & SD_BUS_VTABLE_HIDDEN)
continue;
if (!(v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION))
continue;
if (r < 0)
return r;
}
}
}
}
r = sd_bus_message_close_container(m);
if (r < 0)
return r;
if (r < 0)
return r;
return 1;
}
const char *path,
const char *interface,
char **names) {
bool found_interface = false;
char *prefix;
int r;
return -ENOTCONN;
/* 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. */
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;
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;
}
const char *path,
const char *interface,
const char *name, ...) {
char **names;
return -ENOTCONN;
if (!name)
return 0;
}
static int object_added_append_all_prefix(
sd_bus_message *m,
Set *s,
const char *prefix,
const char *path,
bool require_fallback) {
struct node_vtable *c;
struct node *n;
int r;
assert(m);
assert(s);
if (!n)
return 0;
void *u = NULL;
if (require_fallback && !c->is_fallback)
continue;
if (r < 0)
return r;
if (bus->nodes_modified)
return 0;
if (r == 0)
continue;
/* If a child-node already handled this interface, we
* skip it on any of its parents. The child vtables
* always fully override any conflicting vtables of
* any parent node. */
continue;
if (r < 0)
return r;
if (previous_interface) {
r = sd_bus_message_close_container(m);
if (r < 0)
return r;
r = sd_bus_message_close_container(m);
if (r < 0)
return r;
}
if (r < 0)
return r;
if (r < 0)
return r;
if (r < 0)
return r;
previous_interface = c->interface;
}
if (r < 0)
return r;
if (bus->nodes_modified)
return 0;
}
if (previous_interface) {
r = sd_bus_message_close_container(m);
if (r < 0)
return r;
r = sd_bus_message_close_container(m);
if (r < 0)
return r;
}
return 0;
}
char *prefix;
int r;
assert(m);
/*
* This appends all interfaces registered on path @path. We first add
* the builtin interfaces, which are always available and handled by
* sd-bus. Then, we add all interfaces registered on the exact node,
* followed by all fallback interfaces registered on any parent prefix.
*
* If an interface is registered multiple times on the same node with
* different vtables, we merge all the properties across all vtables.
* However, if a child node has the same interface registered as one of
* its parent nodes has as fallback, we make the child overwrite the
* parent instead of extending it. Therefore, we keep a "Set" of all
* handled interfaces during parent traversal, so we skip interfaces on
* a parent that were overwritten by a child.
*/
s = set_new(&string_hash_ops);
if (!s)
return -ENOMEM;
if (r < 0)
return r;
if (r < 0)
return r;
if (r < 0)
return r;
if (r < 0)
return r;
if (r < 0)
return r;
if (bus->nodes_modified)
return 0;
if (r < 0)
return r;
if (bus->nodes_modified)
return 0;
}
return 0;
}
int r;
/*
* This emits an InterfacesAdded signal on the given path, by iterating
* all registered vtables and fallback vtables on the path. All
* properties are queried and included in the signal.
* This call is equivalent to sd_bus_emit_interfaces_added() with an
* explicit list of registered interfaces. However, unlike
* interfaces_added(), this call can figure out the list of supported
* interfaces itself. Furthermore, it properly adds the builtin
* org.freedesktop.DBus.* interfaces.
*/
return -ENOTCONN;
if (r < 0)
return r;
if (r == 0)
return -ESRCH;
do {
bus->nodes_modified = false;
m = sd_bus_message_unref(m);
r = sd_bus_message_new_signal(bus, &m, object_manager->path, "org.freedesktop.DBus.ObjectManager", "InterfacesAdded");
if (r < 0)
return r;
if (r < 0)
return r;
if (r < 0)
return r;
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);
}
static int object_removed_append_all_prefix(
sd_bus_message *m,
Set *s,
const char *prefix,
const char *path,
bool require_fallback) {
struct node_vtable *c;
struct node *n;
int r;
assert(m);
assert(s);
if (!n)
return 0;
void *u = NULL;
if (require_fallback && !c->is_fallback)
continue;
continue;
/* If a child-node already handled this interface, we
* skip it on any of its parents. The child vtables
* always fully override any conflicting vtables of
* any parent node. */
continue;
if (r < 0)
return r;
if (bus->nodes_modified)
return 0;
if (r == 0)
continue;
if (r < 0)
return r;
if (r < 0)
return r;
previous_interface = c->interface;
}
return 0;
}
char *prefix;
int r;
assert(m);
/* see sd_bus_emit_object_added() for details */
s = set_new(&string_hash_ops);
if (!s)
return -ENOMEM;
if (r < 0)
return r;
if (r < 0)
return r;
if (r < 0)
return r;
if (r < 0)
return r;
if (r < 0)
return r;
if (bus->nodes_modified)
return 0;
if (r < 0)
return r;
if (bus->nodes_modified)
return 0;
}
return 0;
}
int r;
/*
* This is like sd_bus_emit_object_added(), but emits an
* InterfacesRemoved signal on the given path. This only includes any
* registered interfaces but skips the properties. Note that this will
* call into the find() callbacks of any registered vtable. Therefore,
* you must call this function before destroying/unlinking your object.
* Otherwise, the list of interfaces will be incomplete. However, note
* that this will *NOT* call into any property callback. Therefore, the
* object might be in an "destructed" state, as long as we can find it.
*/
return -ENOTCONN;
if (r < 0)
return r;
if (r == 0)
return -ESRCH;
do {
bus->nodes_modified = false;
m = sd_bus_message_unref(m);
r = sd_bus_message_new_signal(bus, &m, object_manager->path, "org.freedesktop.DBus.ObjectManager", "InterfacesRemoved");
if (r < 0)
return r;
if (r < 0)
return r;
if (r < 0)
return r;
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);
}
static int interfaces_added_append_one_prefix(
sd_bus_message *m,
const char *prefix,
const char *path,
const char *interface,
bool require_fallback) {
bool found_interface = false;
struct node_vtable *c;
struct node *n;
void *u = NULL;
int r;
assert(m);
if (!n)
return 0;
if (require_fallback && !c->is_fallback)
continue;
continue;
if (r < 0)
return r;
if (bus->nodes_modified)
return 0;
if (r == 0)
continue;
if (!found_interface) {
if (r < 0)
return r;
if (r < 0)
return r;
found_interface = true;
}
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_message *m,
const char *path,
const char *interface) {
char *prefix;
int r;
assert(m);
if (r != 0)
return r;
if (bus->nodes_modified)
return 0;
if (r != 0)
return r;
if (bus->nodes_modified)
return 0;
}
return -ENOENT;
}
char **i;
int r;
return -ENOTCONN;
if (strv_isempty(interfaces))
return 0;
if (r < 0)
return r;
if (r == 0)
return -ESRCH;
do {
bus->nodes_modified = false;
m = sd_bus_message_unref(m);
r = sd_bus_message_new_signal(bus, &m, object_manager->path, "org.freedesktop.DBus.ObjectManager", "InterfacesAdded");
if (r < 0)
return r;
if (r < 0)
return r;
if (r < 0)
return r;
if (r < 0)
return r;
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);
}
_public_ int sd_bus_emit_interfaces_added(sd_bus *bus, const char *path, const char *interface, ...) {
char **interfaces;
return -ENOTCONN;
}
_public_ int sd_bus_emit_interfaces_removed_strv(sd_bus *bus, const char *path, char **interfaces) {
int r;
return -ENOTCONN;
if (strv_isempty(interfaces))
return 0;
if (r < 0)
return r;
if (r == 0)
return -ESRCH;
r = sd_bus_message_new_signal(bus, &m, object_manager->path, "org.freedesktop.DBus.ObjectManager", "InterfacesRemoved");
if (r < 0)
return r;
if (r < 0)
return r;
r = sd_bus_message_append_strv(m, interfaces);
if (r < 0)
return r;
}
_public_ int sd_bus_emit_interfaces_removed(sd_bus *bus, const char *path, const char *interface, ...) {
char **interfaces;
return -ENOTCONN;
}
sd_bus_slot *s;
struct node *n;
int r;
if (!n)
return -ENOMEM;
s = bus_slot_allocate(bus, !slot, BUS_NODE_OBJECT_MANAGER, sizeof(struct node_object_manager), NULL);
if (!s) {
r = -ENOMEM;
goto fail;
}
s->node_object_manager.node = n;
bus->nodes_modified = true;
if (slot)
*slot = s;
return 0;
fail:
bus_node_gc(bus, n);
return r;
}