downloader using fifo in bash

perpetudl.sh

#!/bin/bash

FIFOPATH="/tmp/perpetudl"
DLPATH="/home/indrora/downloads/"

function pd_help
{
  echo "USAGE: $0 [OPTIONS]"
	echo "Options:"
	echo "  -a     start a download"
	echo "  -s     start perpetudl"
	echo "  -c     clean up after an old instance"
	echo ""
	echo "written by morgan gangwere <[email protected]>"
}

function pd_cleanup
{
	rm -f $FIFOPATH
}

function pd_run
{
	pd_cleanup;
	mkfifo $FIFOPATH
	cd $DLPATH
	while true; do
		DLURI=$(cat $FIFOPATH)
		wget $DLURI
	done
	pd_cleanup;
}

case $1 in
	-a)
		if [ -f FIFOPATH ]; then
			URL=$2
			echo $2 > $FIFOPATH
		else
			echo "Not running! Start it!";
		fi
	;;
	-s)
		pd_run;
	;;
	-c)
		pd_cleanup;
	;;
	*)
		pd_help;
	;;
esac