Hi!
> > Sorry, alan. No. Unix is broken with this part.
>
> When you run as root, you run risks and have to be careful.
No. You can't be carefull. Users have full chance to get you in this case.
> thing about Unix is that it wraps pids and does _not_ pick random pids. You shouldn't
> get around to the same pid for at least a reasonable amount of time, unless someone
> is spawning processes _very_ fast.
But someone probably _is_ spawning processes very fast if they want to
screw you.
> > But that's wrong. Pavel may have seen you are going to kill his emacs
> > and may have wrapped pids, killed his emacs himself, and you are now
> > killing _your_ netscape you've just ran.
>
> Erm, too bad that's exactly what _doesn't_ happen under Unix. Your netscape
> you just started will get a new pid, after the latest one taken. No matter if that
> process died or not.
I forgot to mention: of course _pavel_ is evil and created/killed just
enough processes for PIDs to wrap in bad way.
Pavel
-- I'm pavel@ucw.cz. "In my country we have almost anarchy and I don't care." Panos Katsaloulis describing me w.r.t. patents me at discuss@linmodems.org- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Sun Jan 23 2000 - 21:00:16 EST