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Date:	Fri, 10 Sep 2004 12:27:54 +0200
From:	Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: sed-4.1.2-1: backslash in 'i' and 'a' changed?
Message-ID:	<20040910102754.GA2559@cygbert.vinschen.de>
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References:	<KCEOLMMHICICJKHPFOALOEILCIAA DOT Jan DOT Schormann AT BrainLAB DOT com>
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In-Reply-To:	<KCEOLMMHICICJKHPFOALOEILCIAA.Jan.Schormann@BrainLAB.com>
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On Sep 10 10:06, Jan Schormann wrote:
> Hi,
> 
> try this:
> 
>  $ echo | sed -e 'a\\'
> 
> in sed-4.0.9-2 and sed-4.1.2-1: The old one produces a backslash,
> the new one doesn't. Unfortunately, this breaks a makefile I use
> for generating LaTeX output ...
> 
> Can this be a side effect of the change described below? Will this
> be stable or is it a bug?

I'd guess this is a stable fix.  From `info sed':

  `a\'
  `TEXT'
       [...]
       Escape sequences in TEXT are processed, so you should use `\\' in
       TEXT to print a single backslash.

It looks like the old behaviour is a bug, not the new one.  Try
  echo | sed -e 'a\\\'
with the old version.  It will also print just one backslash.

Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          mailto:cygwin AT cygwin DOT com
Red Hat, Inc.

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