From owner-freebsd-stable  Tue Oct 16  6:40:53 2001
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To: Nick Barnes <Nick.Barnes@pobox.com>
Subject: Re: setenv() cores with NULL value [was Re: Gdm proplem on 4.4] 
Cc: Zero Sum <count@shalimar.net.au>, cjclark@alum.mit.edu,
	"Crist J. Clark" <cristjc@earthlink.net>,
	Heath Nielson <heath@cs.byu.edu>, David Marker <marker_d@yahoo.com>,
	freebsd-stable@FreeBSD.ORG
In-reply-to: Your message of "Tue, 16 Oct 2001 14:06:09 BST."
		<10872.1003237569@thrush.ravenbrook.com> 
References: <10872.1003237569@thrush.ravenbrook.com>  
Date: Tue, 16 Oct 2001 07:40:47 -0600
From: Warner Losh <imp@harmony.village.org>
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In message <10872.1003237569@thrush.ravenbrook.com> Nick Barnes writes:
: It was never generally true.  Your memory may have its roots in the
: fact that some operating systems on some machines in the early 80s
: (VMS on VAXen, ISTR) wired page zero to be zero on read, discard on

4.2 and 4.3 BSD on VAXen, not VMS.  VMS didn't map page 0 in userland.

Warner

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