Signal delivery to kernel threads/processes?

[Bruce Evans]

On Fri, 16 Jan 2004, Robert Watson wrote:

> On Fri, 16 Jan 2004, Robert Watson wrote:
>
> > On Fri, 16 Jan 2004, Robert Watson wrote:
> >
> > > 	if (p->p_flag & P_SYSTEM)
> > > 		return (EPERM);
> >
> > Another possible interpretation, not quite the same, might be to use
> > P_KTHREAD.
>
> And, to add insult to injury by following up to my post yet another time:
> init has P_SYSTEM set, so P_KTHREAD is a much better choice.  Either that
> or introduce a P_KERNEL flag.

Setting P_SYSTEM for init is a bug.  It also breaks debugging.  Setting it
for init seems to be just a bug in init_main.c 1.124.  I have run without
this setting for many years.  I noticed the breakage mainly for
"cat /proc/1/map".

Bruce