shell script 读取脚本名， 完事一直叫

#!/bin/bash
_mydir="$(dirname $0)"
_myfile="$(basename $0)"
interval=1


echo "Script name $_myfile resides in $_mydir directory."


echo "Job Done; hit [CTRL+C] to stop!"
while true
do
    echo -ne "\r\a"
    sleep $interval
done