#!/bin/sh
#
# Count file marks on a tape.  It can optionally position the tape
# after the last mark so you can append to the end of it.
#
# Andy Welter
# www.the-welters.com
#
USAGE="mtfcount [-f <devname>] [-append|-a]"
if [ "$TAPE" = "" ]; then
	DEV=/dev/rmt/0n
else
	DEV=$TAPE
fi
while [ $# -ge 1 ]; do
	case $1 in 
	-f)
		DEV=$2
		shift 2
		;;
	-append|-a)
		APPEND=yes
		shift
		;;
	*)
		echo "$USAGE"
		exit 1
		;;
	esac
done
mt -f $DEV rewind
COUNT=0
RC=0
while [ $RC -eq 0 ]; do
	echo "Skipping file $COUNT..."
	mt -f $DEV fsf 1
	RC=$?
	if [ $RC -eq 0 ]; then
		COUNT=`expr $COUNT + 1`
	fi
done

echo "$COUNT files found on tape"
echo "rewinding tape..."
mt -f $DEV rewind
if [ "$APPEND" = "yes" ]; then
	if [ $COUNT -ge 1 ]; then
		echo "positioning tape to the end..."
		mt -f $DEV fsf $COUNT
	fi
fi