[883] in bugtraq
Re: MAGIC PIDs (was Re: magic??)
daemon@ATHENA.MIT.EDU (Neil Woods)
Thu Feb 2 23:21:54 1995
From: Neil Woods <neil@legless.demon.co.uk>
To: bugtraq@fc.net
Date: Fri, 3 Feb 1995 01:32:57 +0100 (GMT)
In-Reply-To: <9502021040.ZM1178@pamd.cig.mot.com> from "robert owen thomas" at Feb 2, 95 10:40:25 am
>
> what, exactly, is a "MAGIC PID"? is this a change in the priority/nice level?
> pid's, in general, are assigned on a rotary (more-or-less) basis. has some
> kernel hack set aside a block of actual pids? this seems odd. so then,
> what is being changed in /dev/kmem? priority? nice? pid?
>
MAGIC PIDS are conceptually the same, in many respects to uids - ie
the MAGIC UID is obviously 0. Theres a bit more flexibility involved,
its possible to specify which tranche of pids have a magical quality.
Vendors will have to support MAGIC PIDS, for the forthcoming additions
to POSIX compliance.
Cheers,
Neil
--
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