#!/bin/sh

echo "`basename $0` (c)2011 PaulTT"
echo "  usage: `basename $0` INPUT_FILE OUTPUT_FILE [status_update_interval]"
echo ""

if [ $# -lt 3 ]; then
	set ""
fi

PTT_IF="$1"
PTT_OF="$2"
PTT_SLEEP=$3
if [ "x$PTT_SLEEP" = "x" ]; then
	PTT_SLEEP=20
fi

dd if="$PTT_IF" of="$PTT_OF"& pttpid=$!

while true; do
	sleep $PTT_SLEEP ;
	kill  -USR1 $pttpid || die "dd ended its execution";
done