if	test -d $1 
	then	if	test -d $1/prev && test -d $1/curr 
		then	{
			echo "// opening \`"$1"'";
			exit 1
		}
		else	{
			echo "<< \`"$1"' has been corrupted >>";
			exit 0
		}
		fi
	fi

if	test -f $1
	then	{
		echo	"<< \`"$1"' is not a PFL database >>";
		exit 0
	}
fi

echo "// creating \`"$1"'";
mkdir $1 $1/prev $1/curr;
echo "// opening \`"$1"'";
exit 2
