Start Minecraft Bukkit Server on *nix

#!/bin/bash
cd $(dirname "$(readlink -fn "$0")")

ls craftbukkit*.jar &>2
if [[ $? -ne 0 ]]; then
    echo "No craftbukkit jars found!"
    exit 1
fi

craftbukkit=(craftbukkit*.jar)
craftlength=${#craftbukkit[@]}

if [[ $craftlength -eq 1 ]]; then
    jar=${craftbukkit[0]}
    echo "Found only one craftbukkit jar"
    echo "Using $jar"
    echo
else
    echo "Found multiple craftbukkit jars"
    echo "Pick one to run"

    i=-1
    for craft in ${craftbukkit[@]}; do
        ((i++))
        echo "    $i) $craft"
    done

    echo "    x) EXIT"

    while true; do
        read line

        if [[ -z "$line" || "$line" = "x" || "$line" = "X" ]]; then
            echo "Bye!"
            exit 0
        fi

        if [[ line -ge 0 && line -le $i ]]; then
            jar=${craftbukkit[$line]}
            break
        fi

        echo "Valid options are between 0 and $i"
    done
fi

java -Xmx1024M -jar $jar