Import sources from 2011-03-30 iso image - sys/lib

1 files changed, 90 insertions, 0 deletions

diff --git a/sys/lib/backup/restore b/sys/lib/backup/restore
new file mode 100755
index 000000000..a5734b565
--- /dev/null
+++ b/sys/lib/backup/restore
@@ -0,0 +1,90 @@
+#!/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 ne
+if (test -e /sys/lib/backup/funcs)
+	.   /sys/lib/backup/funcs
+switch ($#*) {
+case 1
+case 2
+	rdev=$2
+case *
+	echo usage: $0 arena-num '[dev]' >[1=2]
+	exit usage
+}
+starena=$1
+if (! ~ $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 run
+unmount /mnt/cd >[2]/dev/null
+sleep 1
+kill cdfs | rc
+sleep 1
+cdfs -d $rdev || exit
+cd /mnt/cd
+
+#for (track in d[0-9]*)
+#	venti/wrarena $track	# slow; takes about 12½ mins. per GB
+
+arena = $starena
+# set arenabase for arenastart
+arenabase = `{ venti/printarenapart $arenas | sed -e 's/.*arenabase=//' -e 1q }
+kill printarenapart | rc		# printarenapart leaves a process behind
+# echo arenabase $arenabase
+
+skipping=yes
+for (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