#!/bin/sh
# sometimes linux just loses the serial port, and then it comes back as another port.
# usually it flops around between /dev/ttyUSB0 (where we expect it at boot) and
# /dev/ttyUSB1, so start there for now.

while true; do 
	# sanity check
	[ -c /dev/ttyUSB0 -o -c /dev/ttyUSB1 ] || {
		echo "all (ports) are lost!"
		exit 1
	}

	# are you my serial port?
	[ -c /dev/ttyUSB0 ] && {
		/import/home/ghz/dust/dust.pl /dev/ttyUSB0
	}

	echo "lost ttyUSB0, trying ttyUSB1..."
	sleep 4
	
	# are you my serial port?
	[ -c /dev/ttyUSB1 ] && {
		/import/home/ghz/dust/dust.pl /dev/ttyUSB1
	}

	echo "lost ttyUSB1, trying ttyUSB0..."
	sleep 4
done