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Path: utzoo!watmath!clyde!burl!ulysses!allegra!mit-eddie!genrad!decvax!cwruecmp!hal!ncoast!bsa
From: bsa@ncoast.UUCP (Brandon Allbery)
Newsgroups: net.unix-wizards
Subject: System V vs. ulimit:  if sys5 == ++sys3 then...
Message-ID: <844@ncoast.UUCP>
Date: Fri, 6-Sep-85 20:33:36 EDT
Article-I.D.: ncoast.844
Posted: Fri Sep  6 20:33:36 1985
Date-Received: Thu, 12-Sep-85 08:42:50 EDT
References: <1149@brl-tgr.ARPA>
Reply-To: bsa@ncoast.UUCP (Brandon Allbery)
Followup-To: net.unix-wizards
Organization: North Coast Xenix, Cleveland, OH
Lines: 37

Expires:

Quoted from <1149@brl-tgr.ARPA> ["Another reason why a few sources should come with binary licenses"], by root%bostonu.csnet@csnet-relay.arpa (BostonU SysMgr)...
+---------------
| 
| 	1. The ULIMIT problem, modifying login.c is currently the
| 	only effective way to raise ulimit above 2048 on SYSV.
| 
+---------------

On the Plexus P/35 and P/60 which run System III (and as of last month new ones
run System V), the ulimit is implemented and is changed as follows:

/* ulimit.c */

#define GETTY		"/etc/getty"

main(argc, argv, envp)
char **argv, **envp; {
 	ulimit(2, 1000000L);	/* I think it's 2; I'm on Xenix now, which
 					implements a different ulimit() */
	execve(GETTY, argv, envp);
}

In /etc/inittab the /etc/getty is replaced with /etc/ulimit:

			...:/etc/ulimit tty8 b

I could very well have this wrong if /etc/inittab workls differently (or
getty works differently) on System V, but if not this will give you an
effectively unlimited ulimit without source code.

--bsa
-- 
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* Brandon S Allbery, 6504 Chestnut, Independence, OH 44131  +01 216 524 1416 *
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