#!/bin/bash
# Checks to see if GPS is acquired
RET=0
NTPQP=$( /usr/bin/ntpq -p )
#echo "$NTPQP"

# Find line nr with GPS_NME
i=-1
j=-1
while read REMOTE REFID ST T WHEN POLL REACH DELAY OFFSET JITTER
do
	if ( echo $REMOTE | egrep "(NMEA|127[.]127[.]20[.])" > /dev/null )
	then
		let j=i
		break
	fi
	let i+=1
done <<< "${NTPQP}"
if [ $j -lt 0 ]
then
	# Not found
	echo 0
	exit 0
fi

# Find line nr with assID
let i=-2
NTPQP=$( /usr/bin/ntpq -c lassociations )
while read IND ASSID STATUS CONF REACH AUTH CONDITION LAST_EVENT CNT
do
	if [ $i -eq $j ]
	then
		break
	fi
	let i+=1
done <<< "${NTPQP}"

# Get the data
NTPQP=$( /usr/bin/ntpq -c "cv $ASSID" )
#echo ${NTPQP}

# Process the data
# Set the field separator to newline
IFS=$'\n'
while read LINE
do
	if ( echo $LINE | /bin/grep 'GPRMC' > /dev/null )
	then
		if ( echo $LINE | /usr/bin/awk -F\* '{print $1} ' | \
		    /usr/bin/awk -F, '{print $3 }' | \
		    /bin/grep '^A$' > /dev/null )
		then
			RET=1
		fi
		break
	fi
done <<< "${NTPQP}"

echo $RET