#!/bin/sh
#
# Copyright (c) 2004 Kurt J. Lidl <kurt@lidl.org>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
# 3. The name of the author may not be used to endorse or promote products
#    derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
# TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
# USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
# 
# $Id: dodiskbackup,v 1.1.1.1 2004/05/17 23:52:49 lidl Exp $
#

sdisk=sd0
ddisk=sd1
mnt=/a

# scsi command and option research for spinup/spindown by Chris Ross
spindown() {
	local disk
	disk=$1
	scsicmd -f /dev/r${disk}c -c lu -P re-ten=0,load=0
}

spinup() {
	local disk
	disk=$1
	scsicmd -f /dev/r${disk}c -c lu -P re-ten=0,load=1
}

do_newfs() {
	for part in a d e f h
	do
		newfs -d 0 -i 8192 -U nosoft /dev/r${ddisk}${part}
	done
}

do_mounts() {
	mount -o async /dev/${ddisk}a ${mnt}
	mkdir ${mnt}/usr ${mnt}/var ${mnt}/data
	mount -o async /dev/${ddisk}d ${mnt}/usr
	mount -o async /dev/${ddisk}e ${mnt}/var
	mkdir ${mnt}/var/tmp
	mount -o async /dev/${ddisk}f ${mnt}/var/tmp
	# make sure the direction is set properly
	chmod 1777 ${mnt}/var/tmp
	mount -o async /dev/${ddisk}h ${mnt}/data
}

do_tunefs() {
	local value
	local part
	value=$1
	if [ "$value" = "disable" -o "$value" = "enable" ]; then
	for part in a d e f h
	do
		tunefs -n $value /dev/${ddisk}${part}
	done
	fi
}

# this are done one a time so any error message is easier to see
do_umounts() {
	umount ${mnt}/data
	umount ${mnt}/var/tmp
	umount ${mnt}/var
	umount ${mnt}/usr
	umount ${mnt}
}

do_dump_restore() {
	for fs in / /usr /var /var/tmp /data
	do
		dump 0uf - ${fs} | (cd ${mnt}${fs} && restore -rf -)
		echo ${fs}
	done
}

# sed the existing fstab to reflect the new disk realities
do_fstab_fixup() {
	sed -e "s|^/dev/"${sdisk}"|/dev/"${ddisk}"|" < /etc/fstab > ${mnt}/etc/fstab
}

# turn off soft updates while we do the restore
date
spinup ${ddisk}
do_newfs
do_tunefs "disable"
do_mounts
#exit
do_dump_restore
do_fstab_fixup
do_umounts
do_tunefs "enable" 
#do_mounts
spindown ${ddisk}
date