Linux shell unzip和tar 批量解压文件

#!/bin/sh

UNTAR="tar -xvf "

#unzip all zip files
function unzip_all_file()
{
    for i in *.zip
    do
        unzip $i
    done
}

#untar all tar.gz files
function untar_all_file()
{
    for i in *.tar.gz
    do
        $UNTAR $i
    done
}

case $ in
    unzip)
        unzip_all_file
        ;;
    untar)
        untar_all_file
        ;;

esac