#!/bin/sh

# This file is only used if IFACE fail in the startup-script

IFCONFIG="/sbin/ifconfig"
INTERFACES="/etc/network/interfaces"

IFACE=$(ip -o link show | awk '{print $2,$9}' | grep 'UP' | cut -d ':' -f 1)
ADDRESS=$(hostname -I | cut -d ' ' -f 1)
NETMASK=$($IFCONFIG | grep -w inet |grep -v 127.0.0.1| awk '{print $4}' | cut -d ":" -f 2)
GATEWAY=$(route -n|grep "UG"|grep -v "UGH"|cut -f 10 -d " ")

cat <<-IPCONFIG > "$INTERFACES"
source /etc/network/interfaces.d/*

# The loopback network interface
auto lo $IFACE
iface lo inet loopback

# The primary network interface
iface $IFACE inet static
pre-up /sbin/ethtool -K $IFACE tso off
pre-up /sbin/ethtool -K $IFACE gso off
# Fixes https://github.com/nextcloud/vm/issues/92:
pre-up ip link set dev $IFACE mtu 1430

# Best practice is to change the static address
# to something outside your DHCP range.
address $ADDRESS
netmask $NETMASK
gateway $GATEWAY

# This is an autoconfigured IPv6 interface
# iface $IFACE inet6 auto

# Exit and save:	[CTRL+X] + [Y] + [ENTER]
# Exit without saving:	[CTRL+X]

IPCONFIG

exit 0