This is a bit of advanced rpm trickery that probably falls in the "don't do that" category. :-/ Short version: How do I query in %post, when executed during an upgrade, for the version we are upgrading from? Long version: A custom rpm (that OLPC's XS uses to manage configuration) needs to nuke a dynamically generated config file - /etc/udev/rules.d/70-persistent-net.rules - _only once_. Before version 0.5 of the pkg, the script that drove the device naming was subtly wrong. The problem is: bad data is almost indistinguishable from good data. So I can't make the condition just on the bad data, I want to also check that we're upgrading from a known-bad version. Users will face a small disruption - any manual tweaks of device assignation will be lost, but we don't have many users. This will change soon, so better break it now than later... :-) cheers, m -- martin.langhoff@xxxxxxxxx martin@xxxxxxxxxx -- School Server Architect - ask interesting questions - don't get distracted with shiny stuff - working code first - http://wiki.laptop.org/go/User:Martinlanghoff -- fedora-devel-list mailing list fedora-devel-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/fedora-devel-list