#!/bin/sh usage="$0 [OPTIONS]\n -n <nfspath>\n -s <serverip>" while getopt "n:s:h" opt; do if [ ${opt} = n ]; then nfsroot=${OPTARG} elif [ ${opt} = s ]; then serverip=${OPTARG} elif [ ${opt} = h ]; then echo -e "$usage" exit 0 fi done if [ -n ${serverip} ]; then nfsroot="$serverip:$nfsroot" fi global.linux.bootargs.root="root=/dev/nfs nfsroot=$nfsroot,v3,tcp"