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Date: Mon, 10 Jun 2002 19:29:14 -0400
From: Sergey Babkin <babkin@bellatlantic.net>
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To: Mike Barcroft <mike@FreeBSD.ORG>
Cc: Matthew Dillon <dillon@apollo.backplane.com>,
	Greg 'groggy' Lehey <grog@FreeBSD.ORG>, cvs-committers@FreeBSD.ORG,
	cvs-all@FreeBSD.ORG
Subject: Re: cvs commit: src/include pwd.h
References: <200206091939.g59JdJC05285@freefall.freebsd.org> <20020610004026.GD61036@wantadilla.lemis.com> <200206100049.g5A0nr1P004846@apollo.backplane.com> <20020609211243.C51371@espresso.q9media.com> <200206100314.g5A3EjTt005317@apollo.backplane.com> <20020609232020.F51371@espresso.q9media.com>
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Mike Barcroft wrote:
> 
> Matthew Dillon <dillon@apollo.backplane.com> writes:
> >     Which specification are you looking at?  I'm all for conforming to
> >     standards but this is new to me.
> 
> Well, POSIX and X/Open were merged into on standard POSIX.1-2001
> aka SUSv3.  I think the requirements that the typedefs be in each
> header comes from the X/Open side, but I'm sure Bruce or Garrett could
> elaborate.

This (defining the types multiple times) is definitely not a part 
of Unix95 nor Unix98. And the approach of defining the types multiple
times looks very wrong to me.  It is absolutely bound to end up with
types changed in some headers but not in the others. And I think that
the whole argument about "namespace pollution" is completely bogus.

> >     In anycase, if you are going to remove the sys/types.h dependancy
> >     for pwd.h (and other headers) then you also need to document that in
> >     the related manual pages.
> 
> It won't do any harm to additionally include <sys/types.h>, but you
> are right, they should be updated.

The standard way remove to the requirement of including <sys/types.h>
before <unistd.h> is to include <sys/types.h> from inside <unistd.h>.

-SB

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