libuinput

libuinput is a library that provides an interface to the Linux kernel's uinput module. The uinput module allows userspace programs to create and manage virtual input devices. These virtual devices can then be used to simulate user input events, such as keyboard presses, mouse movements, and joystick actions. This is useful for a variety of applications, including game controllers, remote control systems, and accessibility tools.

The libuinput library simplifies the process of interacting with the uinput module. It abstracts away the complexities of direct kernel interaction, offering a more user-friendly API. Developers can use libuinput to create virtual keyboards, mice, touchpads, and other input devices. The library handles the creation of device files, the sending of input events, and the management of device properties.

Key functionalities provided by libuinput include the ability to define device capabilities, such as supported key codes or mouse buttons. It also allows for the emission of various event types, including key events, relative motion events, and absolute position events. The library is typically used in conjunction with other input handling libraries or frameworks to create sophisticated input simulation and management systems. Its primary purpose is to enable applications to programmatically generate input, bypassing the need for physical user interaction.