sed email regex

#!/bin/bash

email=$1

if [ "$(echo $email | sed -e 's/[a-zA-Z0-9._%+-]\+@[a-zA-Z0-9-]\+\(\.[a-zA-Z]\{2,4\}\)\{1,3\}//g')" != "" ];then

        str="메일주소비정상"

elif [ "$(echo $email | sed -e 's/^ *//g' -e 's/ *$//g' )" == "" ];then

        str="메일주소없음"

else

        str="메일주소정상"

fi

echo $str

sed 참고자료

http://sed.sourceforge.net/grabbag/tutorials/sedfaq.txt