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