#!/bin/bash

# Reload the Linux psmouse kernel module.
#
# Description:
#   Removes and reloads the psmouse module, which controls PS/2 mice and
#   touchpads on many Linux systems. This can resolve cases where the
#   touchpad/mouse has stopped responding.
#
# Usage:
#   ./reload-psmouse.sh
#
# Requirements:
#   - Linux
#   - sudo privileges
#   - psmouse kernel module
#
# Notes:
#   Reloading psmouse may temporarily disconnect the touchpad/mouse.
#   Systems using a different input driver may not be affected.

set -e

if ! command -v modprobe >/dev/null 2>&1; then
    echo "Error: modprobe is not available."
    exit 1
fi

if ! lsmod | grep -q '^psmouse '; then
    echo "psmouse module is not currently loaded."
    echo "Loading psmouse..."
    sudo modprobe psmouse
else
    echo "Reloading psmouse..."
    sudo modprobe -r psmouse
    sudo modprobe psmouse
fi

echo "psmouse module reloaded successfully."