timestamp () {
	echo "Checking timestamp of last full dump of $1;"
	if ! test lfull.$which -ot lfull.$1
	then
		which=$1
	fi
}

ok=1

for dsk in `cat allincs`
do
	which='.'
	. inc.$dsk
	if test -f "lfull.$which"
	then
		echo "Using timestamp of last full dump of $which."
	else
		echo >&2 "No full dump of $which done yet."
		exit 1
	fi

	since="`cat lfull.$which`"
	doing="incremental of $filesys to $device
 files changed since dump of $which at `cat lfull.$which`"

	rm -f log
	(umask 007; >log)

	echo Doing "$doing" ...