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Date:      Wed, 16 Jan 2002 20:10:24 -0600
From:      "Mike Meyer" <mwm-dated-1011665424.930a9d@mired.org>
To:        swear@blarg.net (Gary W. Swearingen)
Cc:        questions@freebsd.org
Subject:   Re: HOWTO -- backup onto CDRs?
Message-ID:  <15430.12944.372926.781882@guru.mired.org>
In-Reply-To: <50528916@toto.iv>

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Gary W. Swearingen <swear@blarg.net> types:
> Looks like /usr/include/sys/stat.h has the definitive list and it adds
> something called a "whiteout".  Never heard of it; maybe it's not
> supported by other code, or just used by the system software.  (The
> "find" man page agrees with perl.)

They get mentioned in the rm and mknod(2) man pages. Find actually
knows about them - it's "-type w", even though it's not documented.

As far as I can tell, the only thing that actually creates whiteouts
is restore, which seems to use it to create slots in directories
before going back and restoring the actual files in them. Which is
vaguely related to the Subject line.

	<mike
--
Mike Meyer <mwm@mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.

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