#!/bin/bash
if [ $# -ne 2 ]
then
	echo "USAGE: `basename $0` <set> <linecount>"
	echo "	trim all files in the named update set, retaining only the first"
	echo "	<linecount> lines"
	exit
fi
if [ -z "$DSS_PATH" ]
then
	DSS_PATH=.
	export DSS_PATH
fi
tmp=`mktemp`
for f in $DSS_PATH/*u$1.*
do
	head -$2 $f > $tmp
	mv $tmp $f
done