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Date:      Thu, 27 Jun 2002 06:10:03 -0700 (PDT)
From:      Michael Adler <mad1@tapil.com>
To:        freebsd-bugs@FreeBSD.org
Subject:   Re: bin/39849: /sbin/restore fails to overwrite files with schg flag set
Message-ID:  <200206271310.g5RDA3Rx038996@freefall.freebsd.org>

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The following reply was made to PR bin/39849; it has been noted by GNATS.

From: Michael Adler <mad1@tapil.com>
To: "Crist J. Clark" <cjc@FreeBSD.ORG>
Cc: FreeBSD-gnats-submit@FreeBSD.ORG
Subject: Re: bin/39849: /sbin/restore fails to overwrite files with
  schg flag set
Date: Thu, 27 Jun 2002 09:04:13 -0400

 At 03:15 AM 6/27/2002, Crist J. Clark wrote:
 >On Tue, Jun 25, 2002 at 01:24:31PM -0400, Michael C. Adler wrote:
 >[snip]
 >
 > > Incremental restore fails to overwrite an older file that has a flag
 > > set making the file immutable.
 >
 >I really think this is a feature and not a bug. However, I can see
 >where one might want this. I think the right way would be to have a
 >command line switch which enables this [su]chg-flag clobbering, and
 >leave the default as-is.
 
 I agree it is debatable.  It seems to me that restore is a special 
 case.  Its goal is to produce a target identical to the source.  Given that 
 the source changed, I thought the target should as well.  It could easily 
 be put on a switch or perhaps it should be turned on with the -r switch.
 
 >Note that there are other, tougher issues when doing restores on an
 >existing filesystem when names collide (e.g. does restore(8)
 >over-write an existing directory with a plain file from backup?).
 >Handling this issue by running a,
 >
 >   # chflags -R 0 /filesystem/path
 >
 >Before a restore(8) is fairly trivial.
 
 Of course this might not do what you want.  Does an incremental dump have 
 all the flags for all files in the target during restore -r?  If not, the 
 target files may lose their flags.
 
 -Michael
 

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