Fix for issue #4

README.md

@@ -43,6 +43,8 @@ docker run -d \
     -p 8078:80 \
     -e TZ=<TIMEZONE> \
     -e BEASTHOST=<BEASTHOST> \
+    -e LAT=xx.xxxxx \
+    -e LONG=xx.xxxxx \
     mikenye/tar1090:latest
 ```
 
@@ -56,6 +58,8 @@ docker run -d \
     -p 8078:80 \
     -e TZ=Australia/Perth \
     -e BEASTHOST=readsb \
+    -e LAT=-33.33333 \
+    -e LONG=111.11111 \
     mikenye/tar1090:latest
 ```
 
@@ -81,6 +85,8 @@ services:
     environment:
       - TZ=Australia/Perth
       - BEASTHOST=readsb
+      - LAT=-33.33333
+      - LONG=111.11111
     networks:
       - adsbnet
     ports:
@@ -137,6 +143,8 @@ services:
     environment:
       - TZ=Australia/Perth
       - BEASTHOST=readsb
+      - LAT=-33.33333
+      - LONG=111.11111
     networks:
       - adsbnet
     ports:
@@ -161,6 +169,8 @@ This container accepts HTTP connections on TCP port `80` by default. You can cha
 |----------------------|---------|---------|
 | BEASTHOST | Required. IP/Hostname of a Mode-S/Beast provider (`dump1090`/`readsb`) | |
 | BEASTPORT | Optional. TCP port number of Mode-S/Beast provider (`dump1090`/`readsb`) | `30005` |
+| LAT | Optional. The latitude of your antenna | |
+| LAT | Optional. The longitude of your antenna | |
 | TZ | Optional. Your local timezone in [TZ-database-name](https://en.wikipedia.org/wiki/List_of_tz_database_time_zones) format | |
 
 ## Logging

rootfs/etc/cont-init.d/01-sanity-check

@@ -1,19 +1,30 @@
-#!/usr/bin/with-contenv sh
-# shellcheck shell=sh
+#!/usr/bin/with-contenv bash
+# shellcheck shell=bash
+
+# Define colours
+YELLOW='\033[1;33m'
+LIGHTRED='\033[1;31m'
+NOCOLOR='\033[0m'
 
 # Check to make sure the correct command line arguments have been set
 EXITCODE=0
 if [ -z "${BEASTHOST}" ]; then
-  echo "ERROR: BEASTHOST environment variable not set"
+  echo -e "${LIGHTRED}ERROR: BEASTHOST environment variable not set${NOCOLOR}"
   EXITCODE=1
 fi
+if [ -z "${LAT}" ]; then
+  echo -e "${YELLOW}WARNING: LAT environment variable not set, Home location will not be accurate${NOCOLOR}"
+fi
+if [ -z "${LONG}" ]; then
+  echo -e "${YELLOW}WARNING: LONG environment variable not set, Home location will not be accurate${NOCOLOR}"
+fi
 if [ $EXITCODE -ne 0 ]; then
   exit 1
 fi
 
 # Set up timezone
 if [ -z "${TZ}" ]; then
-  echo "WARNING: TZ environment variable not set"
+  echo "${YELLOW}WARNING: TZ environment variable not set${NOCOLOR}"
 else
   ln -snf "/usr/share/zoneinfo/$TZ" /etc/localtime && echo "$TZ" >/etc/timezone
 fi

rootfs/etc/services.d/readsb/run

@@ -1,11 +1,22 @@
 #!/usr/bin/with-contenv bash
 # shellcheck shell=bash
 
-exec \
-  /usr/local/bin/readsb \
-    --net-only \
-    --write-json=/run/readsb \
-    --quiet \
-    --stats-every=3600 \
-    --net-connector="${BEASTHOST}","${BEASTPORT}",beast_in \
-    2>&1 | awk -W interactive '{print "[readsb] " $0}'
+# Build the readsb command line based on options
+READSB_BIN="/usr/local/bin/readsb"
+
+READSB_CMD=(--net-only)
+READSB_CMD+=(--quiet)
+
+if [ ! -z "${LAT}" ]; then
+    READSB_CMD+=(--lat "${LAT}")
+fi
+
+if [ ! -z "${LONG}" ]; then
+    READSB_CMD+=(--lon "${LONG}")
+fi
+
+READSB_CMD+=(--write-json=/run/readsb)
+READSB_CMD+=(--stats-every=3600)
+READSB_CMD+=(--net-connector="${BEASTHOST}","${BEASTPORT}",beast_in)
+
+"${READSB_BIN}" "${READSB_CMD[@]}" 2>&1 | awk -W Interactive '{print "[readsb] " $0}'