OpenWrt-Tools/DynDNS/install.sh

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# Download lua script
wget https://git.znachor.cz/znachor/OpenWrt-Tools/raw/branch/master/DynDNS/dyndns.lua -O /root/dyndns.lua
# Set local domain
domain=$(uci get dhcp.@dnsmasq[0].domain)
sed -i "s/.lan/.$domain/gi" /root/dyndns.lua
# Create dhcp script
echo "lua /root/dyndns.lua" > /root/dyndns.sh
# Allow execution
chmod +x /root/dyndns.*
# Add dhcpscript to the config
uci set dhcp.@dnsmasq[0].dhcpscript='/root/dyndns.sh'
# Add addnlist to the config
uci set dhcp.@dnsmasq[0].addnhosts='/tmp/dyndns'
# Reload dnsmasq
service dnsmasq reload