X-Recipient: archive-cygwin AT delorie DOT com
X-SWARE-Spam-Status: No, hits=-0.5 required=5.0 	tests=AWL,BAYES_00,SPF_PASS,URIBL_BLACK
X-Spam-Check-By: sourceware.org
Message-ID: <4AB0D66D.4000204@gmail.com>
Date: Wed, 16 Sep 2009 13:13:33 +0100
From: Dave Korn <dave DOT korn DOT cygwin AT googlemail DOT com>
User-Agent: Thunderbird 2.0.0.17 (Windows/20080914)
MIME-Version: 1.0
To: cygwin AT cygwin DOT com
Subject: Re: Bug or feature missing in rsync.
References: <4AA61819 DOT 4030501 AT tlinx DOT org> <4AB0A9CD DOT 3090201 AT lapo DOT it> <4AB0AEBC DOT 6090709 AT lapo DOT it>
In-Reply-To: <4AB0AEBC.6090709@lapo.it>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit
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

Lapo Luchini wrote:

> The real reason is the following test:
> 
>   configure:8272: checking whether to support extended attributes
>   configure:8321: result: No extended attribute support found
> 
> ...well, judging from configure lines 8272-8321 it seems rsync xattr
> support is only available in linux, darwin and freebsd.
> 
> So, yes, that isn't "activating a switch" but rater "write a feature",
> which could be easy or difficult - I don't know enough about it right
> now to be the judge of that; definitely needs some more RTFM regarding
> xattrs on my side (and that needs time, which I have little on my hands,
> right now).
> As usual, the PTC principle applies there to have results faster.
> http://www.cygwin.com/acronyms/#PTC

  It appears that cygwin has the xattr functions implemented and exported:

> $ grep setxattr /gnu/winsup/src/winsup/cygwin/cygwin.din
> fsetxattr SIGFE
> lsetxattr SIGFE
> setxattr SIGFE

  So it could be as simple as using the existing linux support on cygwin too,
by doing something like:

$ diff -pu configure.in.orig configure.in
--- configure.in.orig   2009-09-16 13:10:53.125000000 +0100
+++ configure.in        2009-09-16 13:11:41.437500000 +0100
@@ -933,7 +933,7 @@ if test x"$enable_xattr_support" = x"no"
     AC_MSG_RESULT(no)
 else
     case "$host_os" in
-    *linux*)
+    *linux* | *cygwin*)
        AC_MSG_RESULT(Using Linux xattrs)
        AC_DEFINE(HAVE_LINUX_XATTRS, 1, [True if you have Linux xattrs])
        AC_DEFINE(SUPPORT_XATTRS, 1)

admin AT ubik /usr/src/rsync/rsync-3.0.5

... followed of course by regenerating configure.sh.

  I haven't tested this (my cpu usage is already 100% and likely to stay that
way for the next day or two!), but maybe you'd like to give it a whirl?

    cheers,
      DaveK


--
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