shell脚本实现对文件以及文件夹的压缩/解压

#! /bin/sh
echo "*************************************"
echo "1.set password for folder/file."
echo "2.remove password from folder/file."
echo "0.quit."
echo "*************************************"
read ch
case $ch in
   1) echo "please input your folder/file name:"
   while read name
   do
    if [ -d "$name" ];
    then
      echo "This is a folder."
      zip -re $name.zip $name
      rm -rf $name
      echo "encryption success!"
      break
    elif [ -f "$name" ];
    then
      echo "This is a file."
      gpg -c $name
      rm -f $name
      echo "encryption success!"
    break
    else 
    echo "the file does not exist,please input again:"
   fi
   done
;;
   2) echo "please input your folder/file name:"
   while read name
   do
    if [ -f "$name" ];
    then
     unzip $name;
     break
    elif [ -f "$name.gpg" ]
    then
     gpg $name.gpg
     break
    else 
    echo "the folder/file does not exist,please input again:"
    fi
   done
;;
   3)exit;;
esac