#!/bin/sh # This allows NFS booting to work while also being able to configure # the network interface via DHCP when not NFS booting. Otherwise, a # NFS booted system will likely hang during DHCP configuration. # Attempting to configure the network interface used for NFS will # initially bring that network down. Since the root filesystem is # accessed over this network, the system hangs. # This script is run by ifup and will attempt to detect if a NFS root # mount uses the interface to be configured (IFACE), and if so does # not configure it. This should allow the same build to be disk/flash # booted or NFS booted. nfsip=`sed -n '/^[^ ]*:.* \/ nfs.*[ ,]addr=\([0-9.]\+\).*/s//\1/p' /proc/mounts` if [ -n "$nfsip" ] && ip route get to "$nfsip" | grep -q "dev $IFACE"; then echo Skipping $IFACE, used for NFS from $nfsip exit 1 fi