Re: install rpm within an rpm...continued

[Jeff Johnson <n3npq jbj gmail com>]

On May 19, 2006, at 9:44 AM, Todd Tomaino wrote:

> Hi,
>
> I would like to install an rpm from within another rpm.
>
> After some searching, I found information in the following thread:
>
> "install rpm within an rpm package pre or post install?"
> http://www.redhat.com/archives/rpm-list/2004-November/msg00020.html
>
> Jeff Johnson wrote:
>
> > Even then it's caveat emptor, I believe I'm the only one who has  
> > tried
> > to do what I call "package bundles", i.e. executing rpm -Uvh in %post
> > and rpm -evh in %preun for some manifest of *.rpm's within a package
> > bundle.
>
> When I add the rpm install in %post and attempt to install I get the
> following error:
>
> warning: waiting for transaction lock
> error: can't create transaction lock
>
> One way to avoid this is by executing "rm /var/lock/rpm/ 
> transaction" in
> %post prior to installing the rpm.  However, removing the transaction
> lock was not discussed in the thread I mentioned, and seems like a bad
> practise.
>
> Is this an acceptable method?

Quite acceptable to achieve your goal.

The Berkeley DB locks are quite adequate to protect the database for  
all but the most
pathological problems, like multiple simultaneous installs of  
identical packages, which almost
never happens with current rpm usage.

Even with potential collisions, the damage is minimal, detectable,  
and easily corrected.

> Is there a better way to solve this problem?

The global transaction lock is default off in 4.4.7 and later.

73 de Jeff