Bash Script: Recursive YES/NO user input with parameter for maximum retries.

chooser.sh

#!/bin/bash
yesnochoose () {
    # $1 is the maximum number of retries
    max=$( [ "$1" -eq "$1" ] 2>/dev/null && echo $1  || echo 5 )
    # $2 is the retry count and should not be set when called outside of recursion.
    count=$( [ "$2" -eq "$2" ] 2>/dev/null && echo $2  || echo 0 )
    read uchoose
    uchoose=$(echo $uchoose | sed -e 's/\(.*\)/\U\1/' -e 's/ //g')
    case "$uchoose" in
        "YES"|"YE"|"Y")
        return 0
        ;;
        "NO"|"N")
        return 1
        ;;
        *)
        count=$(expr $count + 1)
        if [ "$count" -ge "$max" ]; then
            return 2
        else
            >&2 echo "Please type 'yes' or 'no'"
            return $(yesnochoose "$max" "$count")
        fi
        ;;
    esac
}
#example usage:
echo "Type yes or no"
yesnochoose
case "$?" in 
    0)
    echo "You selected yes"
    ;;
    1)
    echo "You selected no"
    ;;
    2)
    echo "Maximum attempts exceeded"
    ;;
esac

echo "Type yes or no, you only get one shot."
yesnochoose 1
case "$?" in 
    0)
    echo "You selected yes"
    ;;
    1)
    echo "You selected no"
    ;;
    2)
    echo "Maximum attempts exceeded"
    ;;
esac