Module uinput 

Kernel uinput devices, the first rung of host-capture input injection. Kernel input devices for host-capture injection, over /dev/uinput.

A host session takes its input from the kernel, so a uinput keyboard and pointer reach it whatever display server it runs: no compositor protocol to advertise, no portal on the bus, and no consent dialog to answer. That puts it on the host-capture input ladder below libei and the virtual keyboard and pointer protocols, which a compositor may not offer, and above the portal’s own methods (a socket write to the compositor lands in about 4 us, a uinput write in about 12 us, a portal call in about 2 ms); it is taken only where /dev/uinput is writable — a bare-metal host rather than an unprivileged container.

The pointer carries a normalized absolute axis rather than the layout’s own pixels: a uinput device fixes its axis range when the kernel creates it, while the union layout changes whenever a display is added or resized.

Structs

Device

One kernel device: the fd that created it carries its events until it drops.

Pair

The keyboard and pointer one host session injects through.

Constants

ABS_RANGE

The span an absolute axis is declared over; positions are scaled onto it.

ABS_X

ABS_Y

EV_ABS

EV_KEY

EV_REL

EV_SYN

REL_HWHEEL

REL_WHEEL

REL_X

REL_Y

Functions

available

Whether this process can create kernel input devices.