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#!/bin/bash
# dd-keypress.sh: Capture keystrokes without needing to press ENTER.
keypresses=4 # Number of keypresses to capture.
old_tty_setting=$(stty -g) # Save old terminal settings.
echo "Press $keypresses keys."
stty -icanon -echo # Disable canonical mode.
# Disable local echo.
keys=$(dd bs=1 count=$keypresses 2> /dev/null)
# 'dd' uses stdin, if "if" (input file) not specified.
stty "$old_tty_setting" # Restore old terminal settings.
echo "You pressed the \"$keys\" keys."
# Thanks, Stephane Chazelas, for showing the way.
exit 0
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