On 08/04/2011 10:28 AM, Tom Lane wrote:
> How can anything like that possibly work with any reliability
> whatsoever? If the signal comes in, you don't know whether it was
> triggered by the event Postgres expected, or the event the perl module
> expected, and hence there's no way to deliver it to the right signal
> handler (not that the code you're describing is even trying to do that).
True.
> What *I'd* like is a way to prevent libperl from touching the host
> application's signal handlers at all. Sadly, Perl does not actually
> think of itself as an embedded library, and therefore thinks it owns all
> resources of the process and can diddle them without anybody's
> permission.
>
>
I'm not sure how perl (or any loadable library) could restrict that in
loaded C code, which many perl modules call directly or indirectly. It's
as open as, say, a loadable C function is in Postgres ;-) You have a
gun. It's loaded. If you point it at your foot and pull the trigger
don't blame us. I think you just need to be very careful about what you
do with plperlu. Don't be surprised if things break.
cheers
andrew