----- Original Message ----- From: "Ian Lepore" <i...@freebsd.org>
To: "Eitan Adler" <ead...@freebsd.org>
Cc: <src-committ...@freebsd.org>; <svn-src-...@freebsd.org>; 
<svn-src-head@FreeBSD.org>
Sent: Wednesday, April 30, 2014 3:48 PM
Subject: Re: svn commit: r265132 - in head: share/man/man4 sys/dev/null


On Wed, 2014-04-30 at 06:20 +0000, Eitan Adler wrote:
Author: eadler
Date: Wed Apr 30 06:20:48 2014
New Revision: 265132
URL: http://svnweb.freebsd.org/changeset/base/265132

Log:
  Add a /dev/full device.
/dev/full is similar to /dev/zero except it always returns
  ENOSPC when you attempt to write to it.

For some reason this reminded me of something I've been wanting for a
while but never get around to writing... /dev/ones, it's just
like /dev/zero except it returns 0xff bytes.  Useful for dd'ing to wipe
out flash-based media.

Surely for that you want camcontrol security ...?

   Regards
   Steve
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