Shell Programming and Scripting

#!/bin/sh

# Checking if necessary directories have been made previously and making them if not
if [ ! -d ~/wp ]
then mkdir ~/wp
fi
if [ ! -d ~/ss ]
then mkdir ~/ss
fi
if [ ! -d ~/pics ]
then mkdir ~/pics
fi

# Clear the window of any information before the script starts
clear

# Displaying the choices to a user

echo Option b - Backup files
echo Option r - Restore files
echo Option q - Quit the script

echo Please input b, r or q

# The below lines check that a B, R or Q has been inputted and if not, displays an error
read CHOICE
while [ "$CHOICE" != b -a "$CHOICE" != r -a "$CHOICE" != q ]
do
echo You must enter either b, r or q
read CHOICE
done

# The below lines direct input based on user choice

if [ "$CHOICE" = b ]
then
echo Backup has been selected
echo Choose what type of files you would like to backup
echo Type 'w' for word processing
echo Type 's' for speadsheet
echo Type 'p' for pictures

read BACKUP
# Setting up a loop to ensure data given is valid
while [ "$BACKUP" != w -a "$BACKUP" != s -a "$BACKUP" != p ]
do
echo "Please select a valid letter (w, s or p)"
read BACKUP
done

echo You selected $BACKUP

if [ -d ~/wp ] || [ -d ~/ss ] || [ -d ~/pics ]
then
echo You might be overwriting files. Okay to overwrite?
echo Yes = y No = n
echo If you select No you will be returned to the menu

read OVERWRITE
while [ "$OVERWRITE" != y -a "$OVERWRITE" != n ]
do
echo You must enter y or n
read OVERWRITE
done
fi

if [ "$OVERWRITE" = y ]
then
case $BACKUP in
w) cp /workfiles/wp/* ~/wp/;;
s) cp /workfiles/ss/* ~/ss/;;
p) cp /workfiles/pics/* ~/pics/;;
esac
else [ "$OVERWRITE" = n ]
./scriptfile
fi

# Informing the user of progress and a successful completion of backup
echo The backup has been completed and stored in the appropriate folder

# Giving the user the option to return to the main menu or exit
echo Would you like to go back to the menu and select another option?
echo Yes = y No = n

read OPTION
while [ "$OPTION" != y -a "$OPTION" != n ]
do
echo You must enter y or n
read OPTION
done

if [ "$OPTION" = y ]
then
./scriptfile
else [ "$OPTION" = n ]
exit
fi

elif [ "$CHOICE" = r ]
then
echo Restore has been selected
echo Choose what type of files you would like to restore
echo Type 'w' for word processing
echo Type 's' for speadsheet
echo Type 'p' for pictures

read RESTORE
# Setting up a loop to ensure data given is valid
while [ "$RESTORE" != w -a "$RESTORE" != s -a "$RESTORE" != p ]
do
echo "Please select a valid letter (w, s or p)"
read RESTORE
done

echo You selected $RESTORE

case $RESTORE in
w) cp ~/wp/* /workfiles/wp/;;
s) cp ~/ss/* /workfiles/ss/;;
p) cp ~/pics/* /workfiles/pics/;;
esac

# Informing the user of progress and a successful restoration
echo  The restore has been completed. The type of files you selected have  been copied from your home directory to the workfiles directory.

# Giving the user the option to return to the main menu or exit
echo Would you like to go back to the menu and select another option?
echo Yes = y No = n

read OPTION2
while [ "$OPTION2" != y -a "$OPTION2" != n ]
do
echo You must enter y or n
read OPTION2
done

if [ "$OPTION2" = y ]
then
./scriptfile
else [ "$OPTION2" = n ]
exit
fi

# Exits the script when Q is selected
else [ "$CHOICE" = q ]
exit
fi

# Checking if necessary directories have been made previously and making them if not
if [ ! -d ~/wp ]
then mkdir ~/wp
fi
if [ ! -d ~/ss ]
then mkdir ~/ss
fi
if [ ! -d ~/pics ]
then mkdir ~/pics
fi

mkdir -p ~/wp  ~/ss ~/pics

 -p, --parents     no error if existing, make parent directories as needed

read OPTION
while [ "$OPTION" != y -a "$OPTION" != n ]
do
echo You must enter y or n
read OPTION
done

if [ "$OPTION" = y ]
then
./scriptfile
else [ "$OPTION" = n ]
exit
fi

while true
do
    read OPTION
    case $OPTION in
        [yY] | [yY][Ee][Ss] )
                ./scriptfile
                ;;

        [nN] | [n|N][O|o] )
                exit 
                ;;
        *) echo "You must enter y or n"
            ;;
    esac
done

mkdir -p ~/wp  ~/ss ~/pics

[yY] | [yY][Ee][Ss]

while true
do
    echo " what's your option?"
    read OPTION
    case $OPTION in
        Y|y  )
                echo ./scriptfile
                ;;
        N|n )
                echo " no need backup"
                ;;
        Q|q )
                exit
        *) echo "You must enter y or n"
            ;;
    esac
done