start.sh

#!/bin/bash
set -e

cd /etc/direwolf

if [ -n "$CALLSIGN" -a  -n "$PASSCODE" ]; then
  sed -i "s/^MYCALL.*$/MYCALL ${CALLSIGN}/g" direwolf.conf
  sed -i "s/^IGLOGIN.*$/IGLOGIN ${CALLSIGN} ${PASSCODE}/g" direwolf.conf
else
  echo "CALLSIGN & PASSCODE are required."
  exit 2
fi

## PBEACON line configuration
if [ -n "$LATITUDE" -a -n "$LONGITUDE" ]; then
  sed -i "s/%LATITUDE%/${LATITUDE}/g" direwolf.conf
  sed -i "s/%LONGITUDE%/${LONGITUDE}/g" direwolf.conf
  sed -i "s/%SYMBOL%/${SYMBOL}/g" direwolf.conf
  sed -i "s~%COMMENT%~${COMMENT}~g" direwolf.conf
  sed -i "s/$HEIGHT$/${HEIGHT}/g" direwolf.conf
else
  echo "LATITUDE & LONGITUDE are required."
  exit 3
fi

if [ -n "$ADEVICE" ]; then
  sed -i "s/^ADEVICE.*$/ADEVICE ${ADEVICE//\//\\/}/g" direwolf.conf
fi

if [ -n "$IGSERVER" ]; then
  sed -i "s/^IGSERVER.*$/IGSERVER ${IGSERVER}/g" direwolf.conf
fi

# Optionally start direwolf without rtl_fm as input
if [ -n "$DW_STANDALONE" ]; then
  if [ -n "$ADEVICE" ]; then
    direwolf $DWARGS -c direwolf.conf
  else
    echo "DW_STANDALONE requires ADEVICE also be defined."
    exit 4
  fi
else
  rtl_fm -f $FREQUENCY -d $APRS_SDR_SERIAL | direwolf $DWARGS -c direwolf.conf
fi