文件名大小写转换

for i in *
do
        echo "${i} \c"
        if [ $0 = "lcase" ]
        then
                mv  ${i} `echo ${i} | tr "[a-z]" "[A-Z]"`
        else
                mv  ${i} `echo ${i} | tr "[A-Z]" "[a-z]"`
        fi
done
echo "\nDone with ${0} "