backup

#!/bin/sh

FILE=""

Help()
{
    echo "Usage:"
    echo "backup -h "
    echo "backup -b FILE"
#    echo ""
    echo "   -b     backups file"
    echo "   -h     help (this output)"
}

FileError()
{
    echo "Error: $FILE File not found"
    exit
}

Backup()
{
    [ ! -f "$FILE" ] && FileError

    TIME="$(date +%y-%m-%d-%Hh%Mm)"
    NEWFILE="$FILE.$TIME.bkp"
    cp -f "$FILE" $NEWFILE

    echo "Backup created: $NEWFILE"
}

Restore()
{
    [ ! -f "$FILE" ] && FileError

    NEWFILE=$(echo "$FILE" | sed -e 's/\.[^\.]\+\.[^\.]\+$//')
    cp -f "$FILE" "$NEWFILE"
    
    echo "Backup restored: $NEWFILE"
}


if [ $# -eq 0 ]
then
        echo "Missing options!"
        Help
        exit
fi

while getopts ":b:r:h" OPTION; do
        case $OPTION in
                h)
                    Help
                    exit;;
                b)
                    FILE=$OPTARG
                    Backup
                    exit;;
                r) # restore backup
                    FILE=$OPTARG
                    Restore
                    exit;;

                \?) # Invalid option
                    echo "Error: Invalid option"
                    exit;;
        esac
done