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#!/usr/local/plan9/bin/rc
# the fossil configuration is stored at the 127kB offset in the disk
# and extends for at most 1 kB.
rfork e
fn usage {
echo 'usage: fossil/conf [-w] /dev/sdC0/fossil [config]' >[1=2]
exit usage
}
wflag=no
while(! ~ $#* 0 && ~ $1 -* && ! ~ $1 --){
switch($1){
case -w
wflag=yes
case *
usage
}
shift
}
if(~ $1 --)
shift
if(~ $wflag no && ! ~ $#* 1)
usage
if(~ $wflag yes && ! ~ $#* 1 2)
usage
disk=$1
if(! 9 test -f $disk){
echo 'unknown disk' $1 >[1=2]
exit nodisk
}
fn sigexit {
rm -f /tmp/fossilconf.$pid
}
if(~ $wflag yes){
{echo fossil config; cat $2} >/tmp/fossilconf.$pid || exit oops
if(! 9 test -s /tmp/fossilconf.$pid){
echo 'config is empty; will not install' >[1=2]
exit emptyconfig
}
if(9 test `{9 ls -l /tmp/fossilconf.$pid | awk '{print $6}'} -gt 1024){
echo 'config is too long; max is a little less than a kilobyte' >[1=2]
exit toolong
}
9 dd -quiet 1 -bs 1024 -count 1 -if $disk -iseek 127 \
>/tmp/_fossilconf.old || exit backup
9 dd -quiet 1 -count 2 </dev/zero >>/tmp/fossilconf.$pid || exit dd
9 dd -quiet 1 -bs 1024 -count 1 -if /tmp/fossilconf.$pid \
-trunc 0 -of $disk -oseek 127 || exit dd2
exit 0
}
9 dd -quiet 1 -bs 1024 -count 1 -if $disk -iseek 127 |
zerotrunc >/tmp/fossilconf.$pid
if(! cmp -s <{sed 1q /tmp/fossilconf.$pid} <{echo fossil config}){
echo 'config has bad header' >[1=2]
exit badconfig
}
sed 1d /tmp/fossilconf.$pid
exit 0
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