Re: [v9.3] Extra Daemons (Re: elegant and effective way for running jobs inside a database)

Alvaro Herrera <alvherre@2ndquadrant.com> writes:
> If the bgworker developer gets really tense about this stuff (or
> anything at all, really), they can create a completely new sigmask and
> do sigaddset() etc.  Since this is all C code, we cannot keep them from
> doing anything, really; I think what we need to provide here is just a
> framework to ease development of simple cases.

An important point here is that if a bgworker does need to do its own
signal manipulation --- for example, installing custom signal handlers
--- it would be absolutely catastrophic for us to unblock signals before
reaching worker-specific code; signals might arrive before the process
had a chance to fix their handling.  So I'm against Heikki's auto-unblock
proposal.

			regards, tom lane