date_str=`date | gawk '/./ {print $3 "-" $2 "-" $6}'`

cp $1 /tmp/$1
gawk -v dat=$date_str '/./ {if(($2 ~ "Last")&&($3 ~ "File")&&($4 ~ "Update")){
 				{print "// Last File Update: " dat} 
			   } else {
				{print}
			   }}' $1 > /tmp/$1.new
mv /tmp/$1.new $1

sccs delget $1
