ref: 64ae775d6f91c929f4938be111fcc101b845a811
dir: /sys/lib/backup/tobackup/
#!/bin/rc
# tobackup [set] - print names of venti arenas needing to be dumped to disc set
rfork e
cd /sys/lib/backup
. funcs
switch ($#*) {
case 0
case 1
set=$1
case *
echo usage: $0 '[set]' >[1=2]
exit usage
}
if (! test -d $set) {
echo $0: no backup set named $set in $backup >[1=2]
exit 'no backup set'
}
if (! hget -o index http://$fs/index) {
echo $0: 'can''t fetch venti index from' $fs >[1=2]
exit 'no venti index'
}
if (! test -s index) {
echo $0: 'empty venti index from' $fs >[1=2]
exit 'empty index'
}
cd $set
awk '/^arena=/ { name=$1 }
/ disk=sealed/ { print name; name = "" }
' ../index | sed 's/^arena=//' >nsealed
>>sealed
if (! cmp -s sealed nsealed)
cp nsealed sealed
rm -f nsealed
if (! test -s sealed)
exit ''
>>fake
if (test -s ondisc)
comm -23 <{sort -u sealed fake} <{sort -u ondisc}
if not { # first sealed arenas, dump all
cat sealed
chmod +a ondisc >>ondisc
}