#!/bin/sh
ASPID=$(pidof airspy_adsb)
if [ -z "${ASPID}" ]; then
	exit 0
fi
# Connect for up to 3 seconds and expect to receive at least 5 lines. You can
# update these numbers to different thresholds.
if ! timeout 3 sh -c "nc localhost 33333 | head -5" > /dev/null; then
	ASPID=$(pidof airspy_adsb)
	if grep -qE 'VmPeak.*[0-9]{7}' /proc/${ASPID}/status; then
		# At the time it was I think leaking memory address space (I
		# *think* not that much actual memory?) and at some point
		# get stuck when hitting the Pi's limits so a restart would be
		# enough to revive.
		kill -9 ${ASPID}
	else
		# If the memory state looks fine though, just reboot.
		/sbin/shutdown -r +2
	fi
fi