System V vs. ulimit: if sys5 == ++sys3 then...

[Brandon Allbery]

Expires:

Quoted from <1149 at brl-tgr.ARPA> ["Another reason why a few sources should come with binary licenses"], by root%bostonu.csnet at 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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