Re: Error cannot open Packages index using db3

[Panu Matilainen <pmatilai welho com>]

On Fri, 26 Jul 2002, Pellegrini Giuliano wrote:

> Panu Matilainen wrote:
> 
> > On Fri, 26 Jul 2002, Pellegrini Giuliano wrote:
> >
> > >  Hi all,
> > >
> > > I have created a simple rpm, but I have a problem with %post.
> > >
> > > My spec file is :
> > >
> > > ...
> > >
> > > %post
> > >
> > > rpm -q sendmail
> > >
> > > I can build the packeges but when I try to install with rpm -ivh I have
> > > this message:
> > >
> > > cannot get shared lock on /var/lib/rpm/Packages
> > >
> > > cannot open Packages index using db3 - Operation not permited(1)
> > >
> > > --> The rpm database cannot be opened in db3 format.
> > >     If you have just upgraded the rpm package you need to convert
> > >     your database to db3 format by running "rpm --rebuilddb" as root.
> > >
> > > If I comment the line:
> > >
> > > rpm -q sendmail in the %post section, I haven't nothing errors.
> > >
> > > Where is the problem ?
> > > Is impossible to call a rpm query in the %post section ?
> >
> > Yes, it's impossible in current rpm because the install process has locked
> > the entire rpm database -> you can't even read from tge db. RPM 4.1 allows
> > concurrent access to the database I believe but that wont help you for
> > now...
> >
> > What's the problem you're trying to solve with that query?
> >
> 
> Thank for your reply Panu!
> 
> I have created a package that optimzing the qmail installation and so after
> the installation I would like test if exist another mta server like sendmail.
> 
> If exist I stop daemon, and change /usr/lib/sendmail and newaliases to qmail
> binary.
> 
> How can I verifiy if exist sendmail or another mta ?

On RedHat 7.3 you could use the "alternatives"-system to force a change to 
qmail. For other/earlier distributios you probably should do this with 
dependencies: Require the presence of qmail and conflict or obsolete 
sendmail.

-- 
	- Panu -