source: hybrid/branches/releng-9/nanobsd/tools/prepare-nfs.sh@ 12873

#!/bin/sh

# Get nanobsd image ready to be booted from NFS

# NFS instructions at

# http://www.wirelessleiden.nl/projects/nodefactory/wiki/TestingViaNFS



IMAGE_BASE="/usr/obj/nanobsd.wleiden"

IMAGE_SLICE="${IMAGE_BASE}/_.disk.image"

IMAGE_FULL="${IMAGE_BASE}/_.disk.full"

IMAGE_NFS="${IMAGE_SLICE}-nfs"

# Structure: $NFSBASE 

#            ./cfg  = /cfg mounpoint

#            ./base = / mountpoint

#            ./nfs  = /nfs mountpoint

NFSBASE='/usr/data'

MNT="${NFSBASE}/base"

CFG="${NFSBASE}/cfg"

NFS="${NFSBASE}/nfs"



p_err() {

        echo "[ERROR] $*" 1>&2

}



usage() {

        (

        echo "Usage: $0 [-fn]"

        echo "  -f      force umount, memory device whipes"

        echo "  -n      do not delete/clean cfg partition"

        echo "  -u      unload/eject procedure"

        ) 1>&2

        exit 2

}



# No Root, no fun

if [ `id -u` -ne 0 ]; then

        p_err "Root only"

        exit 1

fi



# Argument parsing using getopts

OPT_FORCE=0

OPT_CLEAN=1

OPT_UNLOAD=0

while getopts "hfnu" OPT; do

        case "$OPT" in

        f) OPT_FORCE=1;;

        n) OPT_CLEAN=0;;

        u) OPT_UNLOAD=1;;

        h) usage;;

        \?) usage;;

        esac

done





# Eeks, we are going to be nasty, hold your horses

if [ $OPT_FORCE -eq 1 -o $OPT_UNLOAD -eq 1 ]; then

        umount -f $MNT  

        for MD in `mdconfig -l -v | grep "${IMAGE_NFS}" | awk '{print $1}'`; do

                mdconfig -d -u $MD

        done

fi



if [ $OPT_UNLOAD -eq 1 ]; then

        echo "All done"

        exit 1;

fi



# If mount point is already used, bail out

if mount | grep -q "${MNT}"; then

        p_err "'${MNT}' already mounted"

        exit 1

fi



# If target nfs image is mounted somehow, bail out

if mdconfig -l -v | grep -q "${IMAGE_NFS}"; then

        MD=`mdconfig -l -v | grep "${IMAGE_NFS}" | cut -c -4`

        p_err "'${IMAGE_NFS}' already mounted at '$MD'"

        exit 1

fi





# Prepare image for use with NFS

cp -v ${IMAGE_SLICE} ${IMAGE_NFS}



MD=`mdconfig -a -t vnode -f ${IMAGE_NFS}`

mount /dev/${MD}a ${MNT}



# Config files lives at NFS location

echo "mount -t nfs -o ro 192.168.4.1:${CFG}" > ${MNT}/conf/default/etc/remount



# Create nfs mount location

mkdir ${MNT}/nfs



# $MNT, $CFG, $NFS lives at nfs

(

echo "192.168.4.1:${MNT} / nfs ro 0 0" 

echo "192.168.4.1:${CFG} /cfg nfs rw,noauto 0 0"

echo "192.168.4.1:${NFS} /nfs nfs rw 0 0"

) > /${MNT}/conf/base/etc/fstab



if [ ${OPT_CLEAN} -eq 1 ]; then

        echo "DELETING all files at ${CFG}, start fresh ;-)" 

        rm -vfR ${CFG}/*

else

        echo "PRESERVING all files at ${CFG}"

fi



echo "DELETING all files at ${NFS}, start fresh ;-)" 

rm -vfR ${NFS}/*



# Allow build images to be used directy via NFS

ln -f ${IMAGE_SLICE} ${NFS}/`basename ${IMAGE_SLICE}`

ln -f ${IMAGE_FULL} ${NFS}/`basename ${IMAGE_FULL}`



# XXX: Proper unmounting after all has finished