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#!/bin/bash
# This script runs on after start in background
# as a service and gets restarted on failure
# it runs ALMOST every seconds
# INFOFILE - state data from bootstrap
infoFile="/home/admin/raspiblitz.info"
# CONFIGFILE - configuration of RaspiBlitz
configFile="/mnt/hdd/raspiblitz.conf"
# LOGS see: sudo journalctl -f -u background
# Check if HDD contains configuration
configExists=$(ls ${configFile} | grep -c '.conf')
if [ ${configExists} -eq 1 ]; then
source ${configFile}
fi
echo "_background.sh STARTED"
counter=0
while [ 1 ]
do
###############################
# Prepare this loop
###############################
# count up
counter=$(($counter+1))
# gather the uptime seconds
upSeconds=$(cat /proc/uptime | grep -o '^[0-9]\+')
####################################################
# RECHECK DHCP-SERVER
# https://github.com/rootzoll/raspiblitz/issues/160
####################################################
# every 5 minutes
6 years ago
recheckDHCP=$((($counter % 300)+1))
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if [ ${recheckDHCP} -eq 1 ]; then
echo "*** RECHECK DHCP-SERVER ***"
# get the local network IP
localip=$(ip addr | grep 'state UP' -A2 | tail -n1 | awk '{print $2}' | cut -f1 -d'/')
echo "localip(${localip})"
# detect a missing DHCP config
if [ "${localip:0:4}" = "169." ]; then
echo "Missing DHCP detected ... trying emergency reboot"
sudo shutdown -r now
else
echo "DHCP OK"
fi
fi
####################################################
# RECHECK PUBLIC IP
# when public IP changes, restart LND with new IP
####################################################
# every 15min - not too often
# because its a ping to external service
recheckPublicIP=$((($counter % 900)+1))
updateDynDomain=0
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if [ ${recheckPublicIP} -eq 1 ]; then
echo "*** RECHECK PUBLIC IP ***"
# execute only after setup when config exists
if [ ${configExists} -eq 1 ]; then
# get actual public IP
freshPublicIP=$(curl -s http://v4.ipv6-test.com/api/myip.php 2>/dev/null)
echo "freshPublicIP(${freshPublicIP})"
echo "publicIP(${publicIP})"
if [ ${#freshPublicIP} -eq 0 ]; then
echo "freshPublicIP is ZERO - ignoring"
# check if changed
elif [ "${freshPublicIP}" != "${publicIP}" ]; then
# 1) update config file
echo "update config value"
sed -i "s/^publicIP=.*/publicIP=${freshPublicIP}/g" ${configFile}
publicIP=${freshPublicIP}
# 2) only restart LND if dynDNS is activated
# because this signals that user wants "public node"
if [ ${#dynDomain} -gt 0 ]; then
echo "restart LND with new environment config"
# restart and let to auto-unlock (if activated) do the rest
sudo systemctl restart lnd.service
fi
# 2) trigger update if dnyamic domain (if set)
updateDynDomain=1
else
echo "public IP has not changed"
fi
else
echo "skip - because setup is still running"
fi
fi
###############################
# LND AUTO-UNLOCK
###############################
# check every 10secs
recheckAutoUnlock=$((($counter % 10)+1))
if [ ${recheckAutoUnlock} -eq 1 ]; then
# check if auto-unlock feature if activated
if [ "${autoUnlock}" = "on" ]; then
# check if lnd is locked
locked=$(sudo -u bitcoin /usr/local/bin/lncli --chain=${network} --network=${chain}net getinfo 2>&1 | grep -c unlock)
if [ ${locked} -gt 0 ]; then
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echo "STARTING AUTO-UNLOCK ..."
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# building REST command
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passwordC=$(sudo cat /root/lnd.autounlock.pwd)
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command="sudo python /home/admin/config.scripts/lnd.unlock.py '${passwordC}'"
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bash -c "${command}"
else
echo "lncli says not locked"
fi
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else
echo "auto-unlock is OFF"
fi
fi
###############################
# UPDATE DYNAMIC DOMAIN
# like afraid.org
# ! experimental
###############################
# if not activated above, update every 6 hours
if [ ${updateDynDomain} -eq 0 ]; then
# dont +1 so that it gets executed on first loop
updateDynDomain=$(($counter % 21600))
fi
if [ ${updateDynDomain} -eq 1 ]; then
echo "*** UPDATE DYNAMIC DOMAIN ***"
# check if update URL for dyn Domain is set
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if [ ${#dynUpdateUrl} -gt 6 ]; then
# calling the update url
echo "calling: ${dynUpdateUrl}"
echo "to update domain: ${dynDomain}"
curl --connect-timeout 6 ${dynUpdateUrl}
else
echo "'dynUpdateUrl' not set in ${configFile}"
fi
fi
###############################
# Prepare next loop
###############################
# sleep 1 sec
sleep 1
# limit counter to max seconds per week:
# 604800 = 60sec * 60min * 24hours * 7days
if [ ${counter} -gt 604800 ]; then
counter=0
echo "counter zero reset"
fi
done