Stacey Marshall writes: > Following on from my "how to upgrade" question, http://www.opensolaris.org/ji > ve/thread.jspa?threadID=21522&tstart=0, how would one achieve this in a patch > ? > > Unlike upgrades it is meant to be possible to back out a patch. Thus the patc > h would need to save the current SMF state for the service so that it could b > e restored.... And I'm not sure if its possible when backing out a patch to > execute scripts to accomplish that either.
It is possible to execute a script during the backout, as well as to stash state into a file. I don't have the details of how to construct those two things, but the internal patch people should be able to help on the vagaries of patch creation. A really simple option is to explicitly dump the appropriate output from svcprop into a file suitable for svccfg -f use, then execute at the appropriate time. It'd look pretty similar to your existing implementation, I think. I don't know the rules for what happens if someone adds a patch which changes config, then changes the config, then backs out the patch. If it's OK to revert to the old config, then the above option will work. Otherwise, you'd need to do a transform of current data back to the old format. liane -- Liane Praza, Solaris Kernel Development liane.praza at sun.com - http://blogs.sun.com/lianep
