mkboot

#!/bin/ksh
#
# mkboot
#
# Chris Cappuccio <chris@nmedia.net>

date=`date +%Y%m%d`
arch=`uname -m`

[ -z "$distloc" ] && distloc=/

[ -z "$totalsize" ] && totalsize=1951488

[ -z "$bytessec" ] && bytessec=512

[ -z "$dest" ] && dest=flashimg.$arch-$date

###
#
# disktab dance

if [[ ! -w /etc ]]; then
 echo "Can't do it, depends on disktab being replaceable!"
 exit 1
fi

random=`dd if=/dev/urandom bs=512 count=1 2>/dev/null | sha512`
tabname=`printf "%.8s" $random`

vncfgroot() {
 [[ $vnd == true ]] && c 0 vnconfig -t vnd-${tabname} $rootdevice $1
}

vnuncfgroot() {
 [[ $vnd == true ]] && c 0 vnconfig -u $rootdevice
}

###
#
# fall back

2() {
 umount -f /dev/"$rootdevice"a
}
1() {
 vnuncfgroot
}
0() {
 [[ -f /etc/disktab.${tabname} ]] && mv /etc/disktab.${tabname} /etc/disktab
 exit 1
}

. ./flashrd.sub

[ -z "$rootdevice" ] && getavailvnd 1 && rootdevice=${vndevices[0]}

[ -z "$tmpmnt" ] && tmpmnt=$(c 0 mktemp -t -d mkboot.XXXXXX)

###
#
# Create boot image

tmplabel=$(c 0 mktemp -t mkbootlabel.XXXXXX)

if [[ $vnd == true ]]; then

 # Create vnd image, must zero out the first few sectors or else disklabel freaks out...
 c 0 "dd if=/dev/zero bs=512 count=512 of=$dest > $TMPDIR/last.output 2>&1"
 cylinders=$((totalsize / 64))
 trackscylinder=1
 sectorstrack=64

else

 # Disk specified, use default kernel geometry
 c 0 "fdisk -f $distloc/usr/mdec/mbr -yi $rootdevice > $TMPDIR/last.output 2>&1"
 c 0 disklabel $rootdevice > $tmplabel
 totalsize=`awk -F": " ' /^total sectors:/ {print $2} ' $tmplabel`
 bytessec=`awk -F": " ' /^bytes\/sector:/ {print $2} ' $tmplabel`
 sectorstrack=`awk -F": " ' /^sectors\/track:/ {print $2} ' $tmplabel`
 trackscylinder=`awk -F": " ' /^tracks\/cylinder:/ {print $2} ' $tmplabel`
 cylinders=`awk -F": " ' /^cylinders:/ {print $2} ' $tmplabel`

fi

echo -n "Disk size `sectors2mbytes $totalsize`MB ($totalsize sectors"
if [ "$bytessec" == "512" ]; then
 echo ")"
else
 echo ", $bytessec bytes/sector)"
fi

# Main partition comprises the total disk after offset
offset=$((4*1024*1024/${bytessec}))
asize=$((totalsize - offset))

echo "vnd-${tabname}:\\" > $tmplabel
echo "	:dt=SCSI:ty=${tabname}:se#${bytessec}:nt#${trackscylinder}:ns#${sectorstrack}:nc#${cylinders}:su#${totalsize}:\\" >> $tmplabel
echo "	:pa#${asize}:oa#${offset}:fa#$((bytessec * 2)):ba#$((bytessec * 16)):ta=4.2BSD:\\" >> $tmplabel
echo "	:pc#${totalsize}:oc#0:" >> $tmplabel

# DISKTAB MODIFIED
c 1 mv /etc/disktab /etc/disktab.${tabname}
c 1 cp $tmplabel /etc/disktab

if [[ $vnd == true ]]; then
 vncfgroot $dest
 c 1 "fdisk -l $totalsize -f $distloc/usr/mdec/mbr -yi $rootdevice > $TMPDIR/last.output 2>&1"
fi

c 1 "disklabel -w $rootdevice vnd-${tabname} > $TMPDIR/last.output 2>&1"

# DISKTAB ORIGINAL
c 1 mv /etc/disktab.${tabname} /etc/disktab

echo -n Creating filesystem on /dev/r${rootdevice}a
c 1 "newfs -S $bytessec /dev/r${rootdevice}a > $TMPDIR/last.output 2>&1"
echo

c 1 mount /dev/${rootdevice}a $tmpmnt

echo Installing bootblocks

c 2 "installboot -r $tmpmnt $rootdevice $distloc/usr/mdec/biosboot $distloc/usr/mdec/boot > $TMPDIR/last.output 2>&1"

c 2 mkdir $tmpmnt/new $tmpmnt/old $tmpmnt/etc

echo Generate initial random seeds

c 2 "dd if=/dev/random of=$tmpmnt/etc/random.seed bs=512 count=1 status=none"
c 2 chmod 600 $tmpmnt/etc/random.seed
c 2 "dd if=/dev/random of=$tmpmnt/etc/host.random bs=65536 count=1 status=none"
c 2 chmod 600 $tmpmnt/etc/host.random

umountwait 1 $tmpmnt

vnuncfgroot

exit 0