Arrow_keys_in_shell_script.txt

#!/bin/bash

IFS= read -d '' -sn1 key

case $key in
$'\\e') TMOUT=.01
while read -sn1 _k
do
key=$key$_k
case $_k in
[A-Za-z^~]) TMOUT=0; break ;;
esac
done
;;
"") break ;;
esac
case $key in
$'\\e[A') echo UP ;;
$'\\e[B') echo DOWN ;;
$'\\e[C') echo RIGHT ;;
$'\\e[D') echo LEFT ;;
* printf '%s\\n' "$key"
esac