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Path: utzoo!mnetor!seismo!mcvax!diku!olamb!kimcm
From: kimcm@olamb.UUCP (Kim Chr. Madsen)
Newsgroups: comp.unix.wizards
Subject: Re: Determining the max number of open files on System V
Message-ID: <292@olamb.UUCP>
Date: Wed, 3-Jun-87 07:31:46 EDT
Article-I.D.: olamb.292
Posted: Wed Jun  3 07:31:46 1987
Date-Received: Wed, 10-Jun-87 02:02:25 EDT
References: <3635@spool.WISC.EDU>
Organization: AmbraSoft A/S (Denmark)
Lines: 27
Keywords: NOFILES, S5R3

In article <3635@spool.WISC.EDU>, dave@romano.WISC.EDU (Dave Cohrs) writes:
> Originally I thought, "Oh, that's, easy, just include <sys/param.h>
> and close 0 through NOFILE". Well, I looked at <sys/param.h> and
> it said,
> 
> 	"The following define is here for temporary compatibility
> 	and should be removed in the next release.  It gives a
> 	value for the maximum number of open files per process.
> 	However, this value is no longer a constant."
> 
> So, where do I get the real value?  What is "v.v_nofiles" and how do
> I get at it's value?

If you just want to know the actual number run the command "/etc/sysdef",
which gives you the current settings of the turnable kernel parameters
and other system information. Or look into the /etc/master.d/kernel file.

But if you want to inspect the max. number of open files at runtime, you
must use the value stored in the kernel.

> Please, don't tell me I have to muck around in kernel memory!

Don't panic use the nlist(3C) call with the v structure (defined in
<sys/var.h>) the value of v.v_nofiles contains the actual value.

					Regards
					Kim Chr. Madsen