1 60d96f2e 2012-01-26 0intro #!/usr/local/plan9/bin/rc
3 60d96f2e 2012-01-26 0intro # the venti configuration is stored at the 248kB offset in the first index
4 60d96f2e 2012-01-26 0intro # partition and extends for at most 8 kB.
8 60d96f2e 2012-01-26 0intro echo 'usage: venti/conf [-w] /dev/sdC0/v.arenas' >[1=2]
13 60d96f2e 2012-01-26 0intro while(! ~ $#* 0 && ~ $1 -* && ! ~ $1 --){
14 60d96f2e 2012-01-26 0intro switch($1){
22 60d96f2e 2012-01-26 0intro if(~ $1 --)
25 60d96f2e 2012-01-26 0intro if(~ $wflag no && ! ~ $#* 1)
27 60d96f2e 2012-01-26 0intro if(~ $wflag yes && ! ~ $#* 1 2)
31 60d96f2e 2012-01-26 0intro if(! 9 test -f $disk){
32 60d96f2e 2012-01-26 0intro echo 'unknown disk' $1 >[1=2]
33 60d96f2e 2012-01-26 0intro exit nodisk
36 60d96f2e 2012-01-26 0intro fn sigexit {
37 60d96f2e 2012-01-26 0intro #rm -f /tmp/venticonf.$pid
40 60d96f2e 2012-01-26 0intro if(~ $wflag yes){
41 60d96f2e 2012-01-26 0intro {echo venti config; cat $2} >/tmp/venticonf.$pid || exit oops
42 60d96f2e 2012-01-26 0intro if(! 9 test -s /tmp/venticonf.$pid){
43 60d96f2e 2012-01-26 0intro echo 'config is empty; will not install' >[1=2]
44 60d96f2e 2012-01-26 0intro exit emptyconfig
46 60d96f2e 2012-01-26 0intro if(9 test `{9 ls -l /tmp/venticonf.$pid | awk '{print $6}'} -gt 8192){
47 60d96f2e 2012-01-26 0intro echo 'config is too long; max is a little less than eight kilobytes' >[1=2]
48 60d96f2e 2012-01-26 0intro exit toolong
50 60d96f2e 2012-01-26 0intro 9 dd -quiet 1 -bs 1024 -count 8 -if $disk -iseek 248 \
51 60d96f2e 2012-01-26 0intro >/tmp/_venticonf.old || exit backup
52 60d96f2e 2012-01-26 0intro 9 dd -quiet 1 -count 2 </dev/zero >> /tmp/venticonf.$pid || exit dd
53 60d96f2e 2012-01-26 0intro 9 dd -quiet 1 -bs 1024 -count 8 -if /tmp/venticonf.$pid \
54 60d96f2e 2012-01-26 0intro -of $disk -trunc 0 -oseek 248 || exit dd2
58 60d96f2e 2012-01-26 0intro 9 dd -quiet 1 -bs 1024 -count 8 -if $disk -iseek 248 |
59 60d96f2e 2012-01-26 0intro zerotrunc >/tmp/venticonf.$pid
61 60d96f2e 2012-01-26 0intro if(! cmp <{sed 1q /tmp/venticonf.$pid} <{echo venti config}){
62 60d96f2e 2012-01-26 0intro echo 'config has bad header' >[1=2]
63 60d96f2e 2012-01-26 0intro exit badconfig
66 60d96f2e 2012-01-26 0intro sed 1d /tmp/venticonf.$pid