GNU bug report logs - #8370
RFC: cp --no-preserve=contents

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Eric Blake <eblake <at> redhat.com>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#8370: closed (RFC: cp --no-preserve=contents)
Date: Thu, 12 Apr 2012 14:42:02 +0000

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Your message dated Thu, 12 Apr 2012 08:39:31 -0600
with message-id <4F86E923.3050409 <at> redhat.com>
and subject line Re: bug#8370: RFC: cp --no-preserve=contents
has caused the debbugs.gnu.org bug report #8370,
regarding RFC: cp --no-preserve=contents
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)


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8370: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=8370
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From: Eric Blake <eblake <at> redhat.com>
To: bug-coreutils <bug-coreutils <at> gnu.org>
Subject: RFC: cp --no-preserve=contents
Date: Mon, 28 Mar 2011 14:55:32 -0600

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cp --attributes-only is great for preserving all metadata attributes
without corrupting contents, but what if I want to preserve only some of
the metadata (for example, copying SELinux context but _not_ timestamps
or content)?  It seems like --attributes-only would be a great synonym
for '--preserve=all  --no-preserve=contents', and that by adding the
'contents' category to --preserve (and defaulting it to on unless turned
off explicitly), that you expose finer-grained tuning to what metadata
gets copied.

-- 
Eric Blake   eblake <at> redhat.com    +1-801-349-2682
Libvirt virtualization library http://libvirt.org

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From: Eric Blake <eblake <at> redhat.com>
To: Pádraig Brady <P <at> draigBrady.com>
Cc: 8370-done <at> debbugs.gnu.org, Jim Meyering <jim <at> meyering.net>
Subject: Re: bug#8370: RFC: cp --no-preserve=contents
Date: Thu, 12 Apr 2012 08:39:31 -0600

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On 04/12/2012 08:20 AM, Pádraig Brady wrote:
> On 04/12/2012 03:04 PM, Jim Meyering wrote:
>> Pádraig Brady wrote:
>> ...
>>> So thinking a bit more about this,
>>> and given the confusion expressed in the above bug report,
>>> perhaps it's best to change --attributes-only to
>>> _not_ truncate existing files?
>>>
>>> I think scripts relying on the truncation behavior
>>> of this relatively new feature would be very rare,
>>> and the non truncating behavior is more generally useful.
>>>
>>> Patch to implement this change is attached.
>>
>> Thanks for doing this.
>> I prefer the new non-truncating behavior, too.
> 
> Cool.
> 
> I'll push with your clean-ups later on.
> Eric is it OK to close this bug,
> or are there cases not handled yet?
> (I didn't fully understand your suggestion TBH).

Yes, I closed the bug now.

-- 
Eric Blake   eblake <at> redhat.com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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