Date: Tue, 16 Oct 2001 07:39:50 -0600 From: Warner Losh <imp@harmony.village.org> To: Matthew Emmerton <matt@gsicomp.on.ca> 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 Subject: Re: setenv() cores with NULL value [was Re: Gdm proplem on 4.4] Message-ID: <200110161339.f9GDdo731450@harmony.village.org> In-Reply-To: Your message of "Tue, 16 Oct 2001 08:27:06 EDT." <Pine.BSF.4.21.0110160826180.16625-100000@xena.gsicomp.on.ca> References: <Pine.BSF.4.21.0110160826180.16625-100000@xena.gsicomp.on.ca>
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In message <Pine.BSF.4.21.0110160826180.16625-100000@xena.gsicomp.on.ca> Matthew Emmerton writes: : I doubt that this was ever the case. A null string and a null pointer are : two different things entirely. Treating them as equal would be wrong. On a VAX running BSD, page 0 was mapped and did start with 0, so a null string and a NULL pointer just happened to be functionally the same. But that was an accidental happinstance, and never specified in any doc. On a VAX running SYSV, they weren't equivolent as page 0 wasn't mapped. Warner To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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