how to lock a directory by using shell scripts in openSUSE

In this tip, I want to demonstrate how to write a shell script to lock a folder on openSUSE desktop. Now suppose that there are many folders on your Desktop and you want to lock down only one or some folders to keep from unwanted user change. This means that user can move, view ,or delete your folder (the locked folder) when they are being on Desktop, but those folder will be back on Desktop again when the computer is restarted.

I think the above idea is similar to DeepFreeze or KioskTool concept. but DeepFreeze or KioskTool will lock the whole system or Desktop environment, your can not specify the folder.

Here are the basic steps to do the work as what I described above:
1. Download file install.sh to somewhere in your computer
2. Go to Konsole and log in as root
3. Go to the location of install.sh then run command ./install
4. Input folder name that you want to lock then you are done

Here is detail of install.sh file:

#!/bin/bash

#input folder name, suppose that folder is located in desktop

  finputbox()

  {

  dialog --title "Inputbox - To take input from you" --backtitle "Linux Shell\

Script Tutorial" --inputbox "Enter folder name on Desktop please" 8 60 2>/tmp/input.$$

  sel=$?

  na=`cat /tmp/input.$$`

  case $sel in

        0) echo "Folder name is $na" ;;

        1) echo "Cancel is Press" ;;

        255) echo "[ESCAPE] key pressed" ;;

  esac

  checkdir="/home/$USER/Desktop/$na"

  if [ -d "$checkdir" ]

  then

        num=1

  else

        num=2

  fi

  }

  #check folder is exist?

  num=2

  echo $num

  while [ $num -eq 2 ]

  do

        finputbox

  done

#create backup file

  touch /home/backup.sh

  chmod 777 /home/backup.sh

  cd /home

  echo "#!/bin/bash" > backup.sh

  echo "rm -f /root/bakcup_file.tar" >> backup.sh

  echo "tar -cpPf /root/bakcup_file.tar /home/$USER/Desktop/$na" >>   backup.sh

  echo "chmod 777 /root/bakcup_file.tar" >> backup.sh

  echo "exit 0" >> backup.sh

#run backup file to back up the folder that you input

  ./backup.sh

#create restoration file

  touch /etc/init.d/restore.sh

  chmod 777 /etc/init.d/restore.sh

  cd /etc/init.d/

  echo "#!/bin/bash" > restore.sh

  echo "rm -fR /home/$USER/Desktop/$na" >> restore.sh

  echo "tar -xpPf /root/bakcup_file.tar" >> restore.sh

  echo "exit 0" >> restore.sh

#Write to boot script: inittab, rc

  grep "/etc/init.d/restore.sh" /etc/inittab >/tmp/inittab.$$

  grep "/etc/init.d/restore.sh" /etc/init.d/rc >/tmp/rc.$$

  ninittab=`cat /tmp/inittab.$$`

  nrc=`cat /tmp/rc.$$`

  if [ "$ninittab" != "/etc/init.d/restore.sh" ]

  then

        echo "/etc/init.d/restore.sh" >> /etc/inittab

  fi

  if [ "$nrc" != "/etc/init.d/restore.sh" ]

  then

        cd /etc/init.d/

        sed -e 's/exit 0//' rc > file.out

        echo "/etc/init.d/restore.sh" >> file.out

        echo "exit 0" >> file.out

        cat file.out > rc

  fi

# remove template file

  rm -f /tmp/input.$$

  rm -f /tmp/ninittab.$$

  rm -f /tmp/nrc.$$

  exit 0

Naturally, if you want the backup tarball or scripts stored somewhere else or named something else, just modify the scripts to indicate the correct directories and filenames.

Any feedback is warmly welcome