Search notes:

/dev/uinput

By writing to /dev/uinput (or /dev/input/uinput), a process can create a virtual input device with specific capabilities. Once this virtual device is created, the process can send events through it, that will be delivered to userspace and in-kernel consumers.
Virtual input devices seem to show up as files named inputN under /sys/devices/virtual/input.

See also

Kernel source: Documentation/input/uinput.rst
The parent directory /dev

Index

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