Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.1 6/24/83; site poseidon.UUCP
Path: utzoo!watmath!clyde!cbosgd!ihnp4!poseidon!brent
From: brent@poseidon.UUCP (Brent P. Callaghan)
Newsgroups: net.unix-wizards
Subject: Re: Reading user structure from /dev/swap on 3B2
Message-ID: <1432@poseidon.UUCP>
Date: Mon, 24-Mar-86 10:22:59 EST
Article-I.D.: poseidon.1432
Posted: Mon Mar 24 10:22:59 1986
Date-Received: Fri, 28-Mar-86 06:19:41 EST
References: <207@abspc.UUCP>
Distribution: net
Organization: AT&T Information Systems, Lincroft NJ
Lines: 26

>	I'm having problems trying to find how to read the user block
>of a process when it's swapped to /dev/swap. I've tried using proc.p_swaddr
>(Swap Address) and have try the following address in swap -
>
>		ctod(proc.p_swaddr)*BSIZE		(BSIZE = 512)
>		ctod(proc.p_swaddr)*1024
>		ctob(proc.p_swaddr)*BSIZE
>		ctob(proc.p_swaddr)*1024
>		ctob(proc.p_swaddr)
>		ctod(proc.p_swaddr)
>
>	All the above produce junk. Any System V R2V2 experts have any ideas?
This works on a 3B2:

addr = (swplo + proc.p_swaddr + ctod(proc.p_size - proc.p_ssize - USIZE)) << BSHIFT ;
lseek(devswap, addr, 0) ;
read(devswap, (char *)&ublock, sizeof(ublock)) ;

Declare swplo as "daddr_t swplo ;" and gets it's value
from /dev/kmem ; It's value is often zero anyway.
-- 
				
Made in New Zealand -->		Brent Callaghan
				AT&T Information Systems, Lincroft, NJ
				{ihnp4|mtuxo|pegasus}!poseidon!brent
				(201) 576-3475