Path: utzoo!utgpu!watmath!att!bellcore!rutgers!cs.utexas.edu!uunet!cbmvax!ag
From: ag@cbmvax.UUCP (Keith Gabryelski)
Newsgroups: comp.unix.questions
Subject: Re: job priority
Message-ID: <7574@cbmvax.UUCP>
Date: 8 Aug 89 16:08:24 GMT
References: <20533@adm.BRL.MIL> <962@virtech.UUCP>
Reply-To: ag@cbmvax.UUCP (Keith Gabryelski)
Organization: Commodore Technology, West Chester, PA
Lines: 32

It is always a toss up for me to post or reply when someone sends
incorrect or misleading information to this news group.  I have
succumbed to the former.

In article <962@virtech.UUCP> cpcahil@virtech.UUCP (Conor P. Cahill) writes:
>In article <20533@adm.BRL.MIL>, SIMSN%NUSDISCS.BITNET@cunyvm.cuny.edu writes:
>>In Sys V, is there a way you can raise the job's priority after sending
>>it to the background earlier on?
>
>There is no standard system call that can be used to modify the priority, or
>nice value, of an already existing process.

Correct.

>You can, however, using the
>symbol table in /unix modify the nice value in the process structure
>(in /dev/kmem, of course) for the indicated process.  Unless the permissions
>are really screwed up on your system, only the superuser will be able to
>do this.

This is also correct, but you failed to mention /etc/renice which
exists on many System V systems (from V2.0 atleast).  It does what
the requester wanted.

There are also several public domain versions floating around.  The
one that comes to mind was posted to a source group about a year ago.
The author was Michael Ditto (ford@kenobi.UUCP).

Pax, Keith
-- 
 "It took no computation to dance to the rock 'n roll station" -- Lou Reed
ag@cbmvax.commodore.com					...!uunet!cbmvax!ag