112 lines
2.4 KiB
Bash
112 lines
2.4 KiB
Bash
:
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#set -ex
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VNDEVICE=vn0
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export BLOCKSIZE=512
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RD=$1 ; shift
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MNT=$1 ; shift
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FSSIZE=$1 ; shift
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FSPROTO=$1 ; shift
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FSINODE=$1 ; shift
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FSLABEL=$1 ; shift
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deadlock=20
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while true
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do
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rm -f fs-image
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if [ ! -b /dev/${VNDEVICE} -o ! -c /dev/r${VNDEVICE} ] ; then
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( cd /dev && sh MAKEDEV ${VNDEVICE} )
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fi
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umount /dev/${VNDEVICE} 2>/dev/null || true
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umount ${MNT} 2>/dev/null || true
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vnconfig -u /dev/r${VNDEVICE} 2>/dev/null || true
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dd of=fs-image if=/dev/zero count=${FSSIZE} bs=1k 2>/dev/null
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# this suppresses the `invalid primary partition table: no magic'
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awk 'BEGIN {printf "%c%c", 85, 170}' |\
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dd of=fs-image obs=1 seek=510 conv=notrunc 2>/dev/null
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vnconfig -s labels -c /dev/r${VNDEVICE} fs-image
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sed '/^minimum:/,$d' /etc/disktab > /etc/disktab.tmp
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cat /etc/disktab.tmp > /etc/disktab
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rm -f /etc/disktab.tmp
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(
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a=`expr ${FSSIZE} \* 2`
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echo
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echo "minimum:ty=mfs:se#512:nt#1:rm#300:\\"
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echo " :ns#$a:nc#1:\\"
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echo " :pa#$a:oa#0:ba#4096:fa#512:\\"
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echo " :pc#$a:oc#0:bc#4096:fc#512:"
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echo
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) >> /etc/disktab
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disklabel -w -r -B \
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-b ${RD}/trees/bin/usr/mdec/fdboot \
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-s ${RD}/trees/bin/usr/mdec/bootfd \
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/dev/r${VNDEVICE} minimum
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newfs -u 0 -t 0 -i ${FSINODE} -m 0 -T minimum -o space /dev/r${VNDEVICE}a
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mount /dev/${VNDEVICE}a ${MNT}
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( set -e && cd ${FSPROTO} && find . -print | cpio -dump ${MNT} )
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set `df -i /mnt | tail -1`
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umount ${MNT}
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fsck -p /dev/r${VNDEVICE}a < /dev/null
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vnconfig -u /dev/r${VNDEVICE} 2>/dev/null || true
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if [ $FSLABEL != "minimum" ] ; then
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echo ${FSSIZE} > fs-image.size
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break
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fi
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echo ">>> Filesystem is ${FSSIZE} K, $4 left"
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echo ">>> ${FSINODE} bytes/inode, $7 left"
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echo ">>> `expr ${FSSIZE} \* 1024 / ${FSINODE}`"
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# As far as I can tell, the following has only really caused me great
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# difficulty..
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#
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# if [ $4 -gt 128 ] ; then
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# echo "Reducing size"
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# FSSIZE=`expr ${FSSIZE} - $4 / 2`
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# continue
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# fi
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# if [ $7 -gt 128 ] ; then
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# echo "Increasing bytes per inode"
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# FSINODE=`expr ${FSINODE} + 8192`
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# continue
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# fi
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# if [ $4 -gt 32 ] ; then
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# echo "Reducing size"
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# FSSIZE=`expr ${FSSIZE} - 4`
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# FSINODE=`expr ${FSINODE} - 1024`
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# continue
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# fi
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# if [ $7 -gt 64 ] ; then
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# echo "Increasing bytes per inode"
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# FSINODE=`expr ${FSINODE} + 8192`
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# continue
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# fi
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# if [ $deadlock -eq 0 ] ; then
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# echo "Avoiding deadlock, giving up"
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# echo ${FSSIZE} > fs-image.size
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# break
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# fi
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# deadlock=`expr $deadlock - 1`
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echo ${FSSIZE} > fs-image.size
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break;
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done
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