Bad file access on the rise

John.Florian at John.Florian at
Fri Jun 7 19:30:49 UTC 2013

notting at wrote on 06/07/2013 15:08:59:

> Right, it would break something that requires sharing SHM segments 
> sessions, or between system and sessions via 0666 SHM segments. I'm just
> curious what things actually do that.

I've seen this done with the Progress RDBMS where multiple data server 
processes share block buffers, semaphores, etc.  They also used the trick 
mentioned earlier of making a file and unlinking it while still open (or 
however exactly that's done) to have certain things (local user process 
block buffers, IIRC) removed automatically.

John Florian
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <>

More information about the devel mailing list