Re: Patch: FYI: ignore unknown children when reaping

[David Daney <ddaney at avtrex dot com>]

Tom Tromey wrote:
> > > > > > "Mark" == Mark Wielaard <mark@klomp.org> writes:
>
>
> > > +      // Note that if process==NULL, then we have an unknown child.
> > > +      // This is not common, but can happen, and isn't an error.
>
>
> Mark> So how/when does this happen? And why isn't it an error?
>
> Native code could fork/exec. 

If this is the case, there is a potential problem.  If whichever entity 
that forked/execed the process does a wait() then it could reap a 
process under control of the process manager.  In this case the process 
manager would be screwed.

I would highly recommend figuring out what was causing the message, as 
it is likely to be incompatible with the way libjcg manages Processes.

> Or, as I recall, you can inherit running
> children from whatever process exec()d this one.
This should not happen.  If your parent is dead, init (pid 1) becomes 
your parent.

David Daney.