Panel + forks + postnote

[beto@plan9.cs.su.oz.au beto@plan9.cs.su.oz.au]

In <95Oct13.094213edt.78814@colossus.cse.psu.edu>
	td@plan9.att.com wrote:

> plan9.cs.su.oz.au!beto asks:
> >I'm having problems after killing processes with
> >the panel library. It looks like there is some kind of
> >sincronization program, I'm not quite sure what's going on.
> >The error is 
> >	bitblt: bad slave 32 on event pipe: fd out of
> >	range or not open
> 
> I believe the problem is that when you execute
> 	postnote(PNGROUP, getpid(), "kill\n");
> after having done
> 	einit(Emouse);
> that you're killing the process that's reading the
> mouse.  Ironically, this postnote appears not to
> terminate the processes that you started by calling
> filter.  At least, it didn't work when I tried it on
> my nextstation.
> 

forsyth@plan9.cs.york.ac.uk pointed out the einit's process, so I just put the
child process created in filter in a different note group, then
did a postnote PNGROUP of that. That works fine.

Thanks a lot