Client

Client

Object Hierarchy:

Description:

[ CCode ( type_id = "g_udev_client_get_type ()" ) ]
public class Client : Object

Client is used to query information about devices on a Linux system from the Linux kernel and the udev device manager.

Device information is retrieved from the kernel (through the <literal>sysfs</literal> filesystem) and the udev daemon ( through a <literal>tmpfs</literal> filesystem) and presented through Device objects. This means that no blocking IO ever happens (in both cases, we are essentially just reading data from kernel memory) and as such there are no asynchronous versions of the provided methods.

To get Device objects, use query_by_subsystem, query_by_device_number, query_by_device_file, query_by_sysfs_path, query_by_subsystem_and_name or the Enumerator type.

To listen to uevents, connect to the uevent signal.

Namespace: GUdev

Package: gudev-1.0

Content:

Properties:

public string[] subsystems { owned get; construct; }
The subsystems to listen for uevents on.

Creation methods:

public Client (string[]? subsystems)
Constructs a Client object that can be used to query information about devices.

Methods:

public Device? query_by_device_file (string device_file)
Looks up a device for a device file.
public Device? query_by_device_number (DeviceType type, DeviceNumber number)
Looks up a device for a type and device number.
public List<Device>? query_by_subsystem (string? subsystem)
Gets all devices belonging to subsystem.
public Device? query_by_subsystem_and_name (string subsystem, string name)
Looks up a device for a subsystem and name.
public Device? query_by_sysfs_path (string sysfs_path)
Looks up a device for a sysfs path.

Signals:

public virtual signal void uevent (string action, Device device)
Emitted when client receives an uevent.

Inherited Members:

All known members inherited from class GLib.Object