Path: utzoo!attcan!telly!lethe!torsqnt!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!uunet!pdn!dinsdale!reggie
From: reggie@dinsdale.nm.paradyne.com (George W. Leach)
Newsgroups: comp.unix.wizards
Subject: Re: Convert between versions of UNIX
Keywords: UNIX,4.2,Xenix,System V,Porting
Message-ID: <6578@pdn.paradyne.com>
Date: 22 Sep 89 17:41:56 GMT
References: <201@fjcp60.GOV>
Sender: usenet@pdn.paradyne.com
Reply-To: reggie@dinsdale.paradyne.com (George W. Leach)
Organization: AT&T Suncoast Division, Largo FL
Lines: 56


    I tried to reply via e-mail, but uunet bounced it back to me.

From pdn.paradyne.com!uunet!MAILER-DAEMON Fri Sep 22 13:07:09 1989
Date: Fri, 22 Sep 89 13:05:28 -0400
From: pdn!uunet!MAILER-DAEMON (Mail Delivery Subsystem)
Subject: Returned mail: Host unknown
Message-Id: <8909221705.AA04717@uunet.uu.net>
To: pdn!dinsdale.paradyne.com!reggie

   ----- Transcript of session follows -----
550 fjcnet.GOV!brinkema... Host unknown

Date: Fri, 22 Sep 89 09:59 EDT
From: reggie@pdn.paradyne.com (George Leach)
To: brinkema@fjcnet.GOV
Subject: Re: Convert between versions of UNIX
Newsgroups: comp.unix.wizards,comp.unix.xenix,comp.unix.ultrix
In-Reply-To: <201@fjcp60.GOV>
Organization: AT&T Suncoast Division, Largo FL
Cc: 

In article <201@fjcp60.GOV> you write:

>I am writing a paper about the problems of converting (porting) software
>between various versions of UNIX, in particular *standard UNIX* System V,
>BSD 4.x, and Xenix.  I have done many ports in many 'directions' but am
>very interested in others' experience.

    Mark Horton (mark@cbosgd.att.com) of AT&T Bell Laboratories, Columbus OH
has been working on a book on the topic of portable C programming, which is
related.  You may want to talk to him.

>In particular, do you have a standard procedure; a set of feature-areas that
>you always check; tricks that make the porting easier?  Also what are the
>hardest feature to port; what features are so subtle that bugs from them
>hide?

    Have you seen the book:

		J.E. Lapin,
		Portable C and UNIX System Programming,
		Prentice-Hall, 1987
		ISBN 0-13-686494-5

    Although I don't totally agree with their standards, they are an example
of one.

>I will sumarize.  tia.  jb.

George

George W. Leach					AT&T Paradyne 
(uunet|att)!pdn!reggie				Mail stop LG-133
Phone: 1-813-530-2376				P.O. Box 2826
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