Article 274 of comp.sys.cdc:
From: cychosz@ecn.purdue.edu (Joe Cychosz)
Newsgroups: comp.sys.cdc
Subject: Re: SUN (Set User Name) on NOS?
Date: Tue, 25 Nov 1997 06:34:59 -0500
Organization: Purdue University CADLAB
Lines: 28
Distribution: inet
Message-ID: <cychosz-2511970634590001@orac.ecn.purdue.edu>
References: <650ued$gn0$1@ratatosk.uio.no>
NNTP-Posting-Host: orac.ecn.purdue.edu
Path: matra.meer.net!news.spies.com!news.sgi.com!nntprelay.mathworks.com!news.pn.com!nntp.pn.com!mozo.cc.purdue.edu!orac.ecn.purdue.edu!user
Xref: matra.meer.net comp.sys.cdc:274

In article <650ued$gn0$1@ratatosk.uio.no>, torfridl@ulrik.uio.no (Torfrid
Kydland Leek) wrote:

> Hello,
> We used to have something called SUN which functioned similarly to SUI.
> Did anybody else have this, and do you know how to validate additional users
> for it?
> I have had the extremely good fortune of being asked to help with a NOS
project,
> and apparently they have this thing installed but don't know much about it.


The program you are referring to alows one to change to a different
user name and thus change the permanent file id.  There have been a
varity of versions of this program over the years.  Some only worked
from system origin jobs, and some would allow usage if the current
user had SYOT priviledges.

All versions of sun worked as SSJ=/VAL= program which was a mechanism that
swapped in specific userlimits and id information in when the program
executed.  If the program modified these values, upon exit the new values
would be swap out in to the control point area.

I have all of this stuff on tape, but I no longer have a cyber to read
it.  If for some reason you need the source to this program please let
me know.

Joe