GUdev.Client – gudev-1.0 – Vala Binding Reference

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 sysfs filesystem) and the udev daemon (through a tmpfs 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

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

@get
@new
@ref
@set
add_toggle_ref
add_weak_pointer
bind_property
connect
constructed
disconnect
dispose
dup_data
dup_qdata
force_floating
freeze_notify
get_class
get_data

get_property
get_qdata
get_type
getv
interface_find_property
interface_install_property
interface_list_properties
is_floating
new_valist
new_with_properties
newv
notify
notify_property
ref_count
ref_sink
remove_toggle_ref
remove_weak_pointer

replace_data
replace_qdata
set_data
set_data_full
set_property
set_qdata
set_qdata_full
set_valist
setv
steal_data
steal_qdata
thaw_notify
unref
watch_closure
weak_ref
weak_unref

Client