if [ $# -ne 1 ]
then exit 1
fi
if [ `grep -c "/dev/$1" /etc/mtab"` -eq 0 ]
then exit 2
fi
for part in `grep $1 /etc/mtab | cut -d' ' -f2`; do
	echo "umount ${part}"	
	umount ${part} >&- 2>&-
    if [ $? -ne 0 ]
    then exit 4
    fi
	rmdir ${part} >&- 2>&-
done	
