[Pkg-torrus-maintainers] Bug#476356: Bug#476356: After upgrade torrus fails with DB_VERSION_MISMATCH

[Marc Haber]

tags #476356 - patch - upstream
thanks

On Thu, May 22, 2008 at 04:12:54PM +0200, Marc Haber wrote:
> On Mon, May 05, 2008 at 12:07:18PM +0200, Joerg Dorchain wrote:
> > Maybe the attached one line patch could help. To my understanding of
> > torrus, perl, and berkeley-db it should fix the bug without side
> > effects.
> 
> I have forwarded this Upstream and will apply the patch if upstream
> agrees. I don't know enough about berkeley-db to judge this myself.

Upstream has rejected the patch since it will run recovery every time
a new process is started, breaking already running processes.

They instead suggest running db_recover unconditionally in the
postinst, which poses some challenge since one would have to find out
whether to recover and which db_recover to use.

I think the best idea would be doing this in perl, which has the
advantage of relying on libberkeleydb-perl to determine whether the
database can be opened, and to automatically use the correct lib to
recover.

The pseudocode would look like:

use BerkeleyDB;

<obtain path to database from torrus config>
if( database cannot be opened ) {
  recover
}

if( database cannot be opened ) {
  barf, cry and die
}

Unfortunately, I do neither have time nor expertise to do this myself
at the moment.

Greetings
Marc

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