Linus Torvalds writes:
>
>
> On Tue, 28 Mar 2000, Richard Gooch wrote:
> >
> > You would need to wrap up fork(2) as well, to clear the cached value
> > for the child.
>
> Yes, the child has to clear the value after a fork().
>
> > And what about getppid(2)? This one is tricky, because it can actually
> > change.
>
> getppid() should be already handled correctly by the CLONE_PARENT
> thing, so that shouldn't need any special attention.
Ah, OK. So we have CLONE_PARENT now. Fine. That still leaves the fun
problems with POSIX signal semantics. Someone developed a patch for a
new kind of process grouping that could be used for this, but it never
seems to have made it into the kernel. Both Larry and I were quite
excited about this scheme, because it wasn't POSIX specific, but was
generally useful. It was a clean approach that could be used by
libpthread as well.
Regards,
Richard....
Permanent: rgooch@atnf.csiro.au
Current: rgooch@ras.ucalgary.ca
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