From 04207020703173e7dc3ba3760ab4e480a3c63bd5 Mon Sep 17 00:00:00 2001
From: kx1t <kx1t@amsat.org>
Date: Thu, 23 May 2024 17:47:57 -0400
Subject: [PATCH] minor addition

---
 rootfs/etc/s6-overlay/scripts/gpsd_mlat_restart | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/rootfs/etc/s6-overlay/scripts/gpsd_mlat_restart b/rootfs/etc/s6-overlay/scripts/gpsd_mlat_restart
index ba7ae9c..872ddc3 100755
--- a/rootfs/etc/s6-overlay/scripts/gpsd_mlat_restart
+++ b/rootfs/etc/s6-overlay/scripts/gpsd_mlat_restart
@@ -42,7 +42,7 @@ while :; do
     new_lat="$(jq -r .lat /run/readsb/gpsd.json)"
     new_lon="$(jq -r .lon /run/readsb/gpsd.json)"
     distance="$(nice -n 20 distance "$lat" "$lon" "$new_lat" "$new_lon")"
-    if (( ${distance%%.*} > GPSD_MIN_DISTANCE )); then
+    if (( ${distance%%.*} > ${GPSD_MIN_DISTANCE:-20} )); then
         "${s6wrap[@]}" echo "Receiver moved ${distance%%.*} meters - restarting all mlat-clients"
         # flag to the mlat-client script that it should try to use GPS coords instead of the predefined LAT/LON
         touch /run/.gpsd_is_active