Same place as I found another useful script, dumpvacroots:
#!/bin/rc
# dumpvacroots - dumps all the vac scores ever stored to the venti server
# if nothing else, this illustrates that you have to control access
# to the physical disks storing the archive!
ventihttp=`{
echo $venti | sed 's/^[a-z]+!([0-9\.]+)![a-z0-9]+$/\1/
s/^[a-z]+!([0-9\.]+)/\1/; s/$/:8000/'
}
hget http://$ventihttp/index |
awk '
/^index=/ { blockSize = 0 + substr($3, 11) }
/^arena=/ { arena = substr($1, 7) }
/^ arena=/ {
start = (0 + substr($5, 2)) - blockSize
printf("venti/printarena -o %.0f %s\n", start, $3 "")
}
' |
rc |
awk '$3 == 16 { printf("vac:%s\n", $2 "") }'
This definitely looks like it could be hacked to support an incremental dump of scores.
No printarenas there on my (9front) system, though. I'll have to see on a proper plan9 system, maybe.