#!/bin/bash
# keypress.sh: Detect a user keypress ("hot keyboard").

echo

old_tty_settings=$(stty -g)   # Save old settings.
stty -icanon
Keypress=$(head -c1)          # or $(dd bs=1 count=1 2> /dev/null)
                              # on non-GNU systems

echo
echo "Key pressed was \""$Keypress"\"."
echo

stty "$old_tty_settings"      # Restore old settings.

# Thanks, Stephane Chazelas.

exit 0