rpm scriptlet ordering for install/remove/upgrade

Question

I'm working on a bug in our rpm scriptlets which is probably originating from order in which our scriptlets are executed during package install/removal/upgrade. We are using yum on Redhat Enterprise.

Obviously I first need a good understanding of the order of the rpm scriptlets - and interestingly enough I have not found a good summary of this anywhere.

From what I gather this is the scriptlet ordering for upgrades:

• %pretrans of new package
• %pre of new package prein
• package install
• %post of new package postin
• %preun of old package
• removal of old package
• %postun of old package
• %posttrans of new package

However it doesn't list the scriptlet orderings for installing a new package not previously on the system (i.e. not an upgrade) and for removing one? From the above ordering I am able to guess how these orderings might look, but I'd like to get some educated opinion on this as well...

Answer 1

Package order for installing a single package for the first time:

• %pretrans of new package
• %pre of new package
• package install
• %post of new package
• %posttrans of new package

Package order for removing a single package:

• %preun of old package
• removal of old package
• %postun of old package

Answer 2

If you are installing two different packages at once (e.g. primary, secondary ), where one depends on the other (secondary requires primary), the order is:

• %pretrans of primary
• %pretrans of secondary
• %pre of primary
• installation of primary
• %post of primary
• %pre of secondary
• installation of secondary
• %post of secondary
• %posttrans of primary
• %posttrans of secondary

When removing these packages at once, the order is:

• %preun of secondary
• removal of secondary
• %postun of secondary
• %preun of primary
• removal of primary
• $postun of primary

Answer 3

Your educated guess is correct - only the steps that are relevant.