#!/bin/rc# restore arena# [dev] - load venti with arenas on dev, stored one per track#	starting with arena#.  must have run fmtarenas before restoring#	the first arena in the partition.#	this must be run on the venti server, without venti running on the#	affected arena partition(s).rfork neif (test -e /sys/lib/backup/funcs)	.   /sys/lib/backup/funcsswitch ($#*) {case 1case 2	rdev=$2case *	echo usage: $0 arena-num '[dev]' >[1=2]	exit usage}starena=$1if (! ~ $starena [0-9] [0-9][0-9] [0-9][0-9][0-9]) {	echo $0: bad starting arena: $starena >[1=2]	exit bad-arena-num} # clear any dregs from a previous rununmount /mnt/cd >[2]/dev/nullsleep 1kill cdfs | rcsleep 1cdfs -d $rdev || exitcd /mnt/cd #for (track in d[0-9]*)#	venti/wrarena $track	# slow; takes about 12½ mins. per GB arena = $starena# set arenabase for arenastartarenabase = `{ venti/printarenapart $arenas | sed -e 's/.*arenabase=//' -e 1q }kill printarenapart | rc		# printarenapart leaves a process behind# echo arenabase $arenabase skipping=yesfor (track in d[0-9]*) {	if (~ track 'd[0-9]*') {		echo $0: no tracks in /mnt/cd >[1=2]		exit no-tracks	}	if (~ $skipping yes) {		# verify that first track is the expected one		type=`{file $track}		switch ($"type) {		case *': venti arena'			name=`{ venti/printarena $track >[2=1] |				sed -e 's/.*name=([^ =]+).*/\1/' -e 1q }		case *			name=NOT-A-VENTI-ARENA		}		kill printarena | rc	# printarena leaves a process behind 		echo -n first track is $"name'; is that right? '		switch (`{read}) {		case [yY]*			skipping=no		case skip			skipping=yes		case *			echo aborting, arena is unchanged. >[1=2]			exit 'wrong track'		}	} 	if (! ~ $skipping yes) {		# copy each track into its slot in the arena partition		venti/printarena $track >[2=1] | sed 1q | tr -d '\12'		kill printarena | rc	# printarena leaves a process behind			off = `{arenastart $arena}		# echo -n writing $track to $arenas at 8K-block offset $off:		sleep 3		echo		# argh!  something (cdfs?) appends 60K of *stuff* to each		# arena on optical disc.  restrain dd.		count=`{ echo $arenasize/$blocksize | bc }		pump -i 1048576 -o 65536 -d 10 <$track |			dd -quiet 1 -count $count -bs $blocksize -of $arenas \				-oseek $off		arena = `{hoc -e $arena+1}	}}# when all done, must run venti/checkarenas, fmtisect, fmtbloom, fmtindex,# and (the big one) venti/buildindex -b /cfg/pie/venti.conf