From owner-svn-src-head@FreeBSD.ORG  Thu Oct 28 01:38:57 2010
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Date: Thu, 28 Oct 2010 01:38:57 +0000
From: Alexey Dokuchaev <danfe@FreeBSD.org>
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Cc: Doug Barton <dougb@FreeBSD.ORG>, svn-src-all@FreeBSD.ORG,
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	Alexander Best <arundel@FreeBSD.ORG>, Dag-Erling Smorgrav <des@FreeBSD.ORG>
Subject: Re: svn commit: r214431 - head/bin/rm
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On Wed, Oct 27, 2010 at 03:33:01PM -0700, Xin LI wrote:
> Maybe something like:
> 
> BUGS
> 
> The -P option assumes that the underlying storage overwrites file block
> when data is written on existing offset.  Several factors including the
> file system and its backing store could defeat the assumption, this
> includes, but is not limited to file systems that uses Copy-On-Write
> strategy (e.g. ZFS or UFS when snapshot is being used), or backing
> datastore that does journaling, etc.  In addition, only regular files
> are overwritten, other types of files are not.

This sounds very nice and FreeBSD-ish.

./danfe