Manpages - sd_bus_add_object_manager.3
Table of Contents
NAME
sd_bus_add_object_manager - Add a D-Bus object manager for a D-Bus object sub-tree
SYNOPSIS
#include <systemd/sd-bus.h>
int sd_bus_add_object_manager(sd_bus **/bus/, sd_bus_slot **/slot/, const char */path/);*
DESCRIPTION
sd_bus_add_object_manager() installs a handler for the given path that implements the GetManagedObjects() method of the org.freedesktop.DBus.ObjectManager interface. See org.freedesktop.DBus.ObjectManager[1] for more information.
To implement the InterfacesAdded and InterfacesRemoved signals of the org.freedesktop.DBus.ObjectManager interface, call *sd_bus_emit_interfaces_added*(3) and *sd_bus_emit_interfaces_removed*(3) whenever interfaces are added or removed from the sub-tree, respectively.
When sd_bus_add_object_manager() succeeds, a slot is created internally. If the output parameter slot is NULL, a “floating” slot object is created, see *sd_bus_slot_set_floating*(3). Otherwise, a pointer to the slot object is returned. In that case, the reference to the slot object should be dropped when the object manager is not needed anymore, see *sd_bus_slot_unref*(3).
RETURN VALUE
On success, sd_bus_add_object_manager() returns a non-negative integer. On failure, it returns a negative errno-style error code.
Errors
Returned errors may indicate the following problems:
-EINVAL
One of the required parameters is NULL or path is not a valid object path.
-ENOPKG
The bus cannot be resolved.
-ECHILD
The bus was created in a different process.
-ENOMEM
Memory allocation failed.
NOTES
These APIs are implemented as a shared library, which can be compiled and linked to with the libsystemd *pkg-config*(1) file.
SEE ALSO
*sd-bus*(3), *busctl*(1), *sd_bus_add_object_vtable*(3), *sd_bus_emit_interfaces_added*(3), *sd_bus_slot_unref*(3)
NOTES
- 1.
org.freedesktop.DBus.ObjectManager
https://dbus.freedesktop.org/doc/dbus-specification.html#standard-interfaces-objectmanager