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From: chris@mimsy.UUCP (Chris Torek)
Newsgroups: comp.unix.questions
Subject: Re: DATAGRAM sockets in the  UNIX  DOMAIN.
Message-ID: <8572@mimsy.UUCP>
Date: Mon, 14-Sep-87 18:12:29 EDT
Article-I.D.: mimsy.8572
Posted: Mon Sep 14 18:12:29 1987
Date-Received: Wed, 16-Sep-87 00:41:29 EDT
References: <577@acer.stl.stc.co.uk> <1041@ius1.cs.cmu.edu>
Organization: U of Maryland, Dept. of Computer Science, Coll. Pk., MD 20742
Lines: 13

In article <1041@ius1.cs.cmu.edu> edw@ius1.cs.cmu.edu (Eddie Wyatt) writes:
>>ioctl(fd,SIOCSPGRP,(char*)&pid)     /* set process group pid for signal  */
>			    ^^^^
>    int pgrp = -getpid();
>    (void) ioctl(port,SIOCSPGRP, (char *) &pgrp);

Careful; the semantics were reversed in the change from 4.2BSD to
4.3BSD.  (I had nothing to do with this!)  See your socket(2) and
fcntl(2) manuals for details.  I think -getpid() => pgrp on 4.3BSD,
and -getpid() => pid on 4.2BSD.
-- 
In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 7690)
Domain:	chris@mimsy.umd.edu	Path:	uunet!mimsy!chris