GNU bug report logs - #23493
gnu sed word replace bug

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: xingzx <richshaw <at> 126.com>
To: bug-sed <at> gnu.org
Subject: gnu sed word replace bug
Date: Tue, 10 May 2016 01:02:35 +0800

[Message part 1 (text/plain, inline)]

Hello:
	I’m not sure whether it’s gnu sed’s bug, but it just behaves  different with Mac OS X :

gnu sed(/usr/local/bin/sed (GNU sed) 4.2.2):
~ $ echo '<WebCore/DOMElement.h>'| /usr/local/bin/sed -E 's/\<WebCore\//\<WebKitLegacy\//'
<<WebKitLegacy/DOMElement.h>

Mac 10.11.3 sed(/usr/bin/sed):
~ $ echo '<WebCore/DOMElement.h>'| /usr/bin/sed -E 's/\<WebCore\//\<WebKitLegacy\//'
<WebKitLegacy/DOMElement.h>

[Message part 2 (text/html, inline)]

Message #8 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Davide Brini <dave_br <at> gmx.com>
To: bug-sed <at> gnu.org
Subject: Re: bug#23493: gnu sed word replace bug
Date: Mon, 9 May 2016 23:17:04 +0200

On Tue, 10 May 2016 01:02:35 +0800, xingzx <richshaw <at> 126.com> wrote:

> Hello:
> 	I’m not sure whether it’s gnu sed’s bug, but it just behaves
> different with Mac OS X :
> 
> gnu sed(/usr/local/bin/sed (GNU sed) 4.2.2):
> ~ $ echo '<WebCore/DOMElement.h>'| /usr/local/bin/sed -E
> 's/\<WebCore\//\<WebKitLegacy\//' <<WebKitLegacy/DOMElement.h>
> 
> Mac 10.11.3 sed(/usr/bin/sed):
> ~ $ echo '<WebCore/DOMElement.h>'| /usr/bin/sed -E
> 's/\<WebCore\//\<WebKitLegacy\//' <WebKitLegacy/DOMElement.h>

No bug, in GNU sed, \< and \> are special and get interpreted, while on
OSX sed the \ in the \< combination is silently stripped. 
So if you just want to match a literal lesser sign, just use it unescaped
(and in any case, you surely don't have to escape it in the replacement
part):

$ echo '<WebCore/DOMElement.h>'| sed -E 's/<WebCore\//<WebKitLegacy\//'
<WebKitLegacy/DOMElement.h>

-- 
D.

Message #11 received at 23493 <at> debbugs.gnu.org (full text, mbox):

From: Jim Meyering <jim <at> meyering.net>
To: Davide Brini <dave_br <at> gmx.com>
Cc: 23493 <at> debbugs.gnu.org
Subject: Re: bug#23493: gnu sed word replace bug
Date: Mon, 9 May 2016 14:59:07 -0700

tags 23493 notabug
close 23493
done

On Mon, May 9, 2016 at 2:17 PM, Davide Brini <dave_br <at> gmx.com> wrote:
> On Tue, 10 May 2016 01:02:35 +0800, xingzx <richshaw <at> 126.com> wrote:
...
> No bug, in GNU sed, \< and \> are special and get interpreted, while on
> OSX sed the \ in the \< combination is silently stripped.
> So if you just want to match a literal lesser sign, just use it unescaped
> (and in any case, you surely don't have to escape it in the replacement
> part):
>
> $ echo '<WebCore/DOMElement.h>'| sed -E 's/<WebCore\//<WebKitLegacy\//'
> <WebKitLegacy/DOMElement.h>

Thanks again for responding, Davide.
With the directives above, I've marked this as a non-bug and closed
the auto-created issue.

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