Re: proced: ppid of process ID 0 can be 0

[Eli Zaretskii]

> From: Stefan Monnier <address@hidden>
> Cc: address@hidden, address@hidden,
>         address@hidden
> Date: Tue, 23 Dec 2008 15:41:56 -0500
> 
> >> >> Indeed, it should be in system-process-attributes which is already
> >> >> OS-dependent.
> >> > If you mean by having no ppid attribute, then that's ambiguous, since
> >> > an attribute can be missing because it is inaccessible for some
> >> > reason, like some kind of failure unrelated to the fact that the
> >> > process is really a root of a tree.
> >> Seems very hypothetical.
> > It's not hypothetical, I've seen such cases and reported them to
> > Roland.
> 
> What were those cases?

Processes that disappeared while Emacs was reading /proc, for example.