X-Recipient:	archive-cygwin AT delorie DOT com
DomainKey-Signature:	a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:content-type:mime-version:subject:from
	:in-reply-to:date:content-transfer-encoding:message-id
	:references:to; q=dns; s=default; b=DQ8q68VJxvlvdb1b++poI9+Mss0q
	38z26goL42DbtQsKCFtngO0j8zd6LLnbWfCA/vFZ11lxYM8UHVGfhowvHkmNnima
	+4iNyzG8lkar+qXLiwTEC0yHGz4pLg6tOIMKefxW5aUfFbyPLzwufNOk6EidAfLG
	UmLrLFFeym9G/HU=
DKIM-Signature:	v=1; a=rsa-sha1; c=relaxed; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:content-type:mime-version:subject:from
	:in-reply-to:date:content-transfer-encoding:message-id
	:references:to; s=default; bh=92lEeG2GegCSrKi14jaUMtAJUQE=; b=pr
	STfAuGybA7IsELAghzVYDodsJTV59IdwP2pvSHzuzPMsiJbMe6iIKhmDwwVxsRem
	JDEDmaMJ6R+KW3b8Ky3yyBYulJUSn/ku+JO/2Y9bq3kaAN9vS/pUS1EHQmjaG+il
	gruHZ5z66RX73XhuBPQOl/LxuSFgybykHujQY2MpI=
Mailing-List:	contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Id:	<cygwin.cygwin.com>
List-Subscribe:	<mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive:	<http://sourceware.org/ml/cygwin/>
List-Post:	<mailto:cygwin AT cygwin DOT com>
List-Help:	<mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender:	cygwin-owner AT cygwin DOT com
Mail-Followup-To:	cygwin AT cygwin DOT com
Delivered-To:	mailing list cygwin AT cygwin DOT com
Authentication-Results:	sourceware.org; auth=none
X-Virus-Found:	No
X-Spam-SWARE-Status:	No, score=0.5 required=5.0 tests=AWL,BAYES_50,KAM_LAZY_DOMAIN_SECURITY,RP_MATCHES_RCVD autolearn=no version=3.3.2
X-HELO:	etr-usa.com
Mime-Version:	1.0 (Mac OS X Mail 8.2 \(2102\))
Subject:	Re: How to expand tabs? Where is expand program.
From:	Warren Young <wyml AT etr-usa DOT com>
In-Reply-To:	<DC315DD3-D309-4473-BF93-743721D42082@etr-usa.com>
Date:	Thu, 2 Jul 2015 22:28:40 -0600
Message-Id:	<9E1A8870-20EA-4AF8-A33B-A44D18C89CD1@etr-usa.com>
References:	<701185250 DOT 1353195 DOT 1435878843444 DOT JavaMail DOT yahoo AT mail DOT yahoo DOT com> <DC315DD3-D309-4473-BF93-743721D42082 AT etr-usa DOT com>
To:	The Cygwin Mailing List <cygwin AT cygwin DOT com>
X-IsSubscribed:	yes
X-MIME-Autoconverted:	from quoted-printable to 8bit by delorie.com id t634Sqb9024538

On Jul 2, 2015, at 6:46 PM, Warren Young <wyml AT etr-usa DOT com> wrote:
> 
> expand(1) goes way, way back before Cygwin.  Not as far back as V7 Unix.  Maybe 4.3BSD?

I did some research, and it turns out that that’s all wrong. :)

According to the FreeBSD/Mac OS X man pages, expand(1) was first introduced in 3BSD (1978), which would put it a bit earlier than the public release of UNIX V7 (1979).

Although V7 did bring some stuff over from BSD — most notably vi — and the borrowings continued until the Great Reunification in SVR4, I can’t find a manual reference to expand(1) in any AT&T Unix, not even the Research branches.

As far as I can tell, expand(1) wasn’t standardized until 1997 as part of SUSv2:

  http://pubs.opengroup.org/onlinepubs/007908799/xcu/expand.html

Weird.

That also means the comment about “before Cygwin” is wrong, since that first appeared in 1995, before SUSv2.  The Cygwin Time Machine doesn’t have any pre-1997 releases of Cygwin, but I did find a 1996 tarball of GNU textutils, and it has expand(1), so it is highly likely that Cygwin had expand(1) before SUSv2 came out.

Wrong, wrong, wrong.  So sad. :)
--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple

- Raw text -