Date: Wed, 30 Apr 2014 09:02:22 -0700 From: Matthew Fleming <mdf@FreeBSD.org> To: Ian Lepore <ian@freebsd.org> Cc: "svn-src-head@freebsd.org" <svn-src-head@freebsd.org>, "svn-src-all@freebsd.org" <svn-src-all@freebsd.org>, "src-committers@freebsd.org" <src-committers@freebsd.org>, Eitan Adler <eadler@freebsd.org> Subject: Re: svn commit: r265132 - in head: share/man/man4 sys/dev/null Message-ID: <CAMBSHm9mocqTVBeC0WUwg8=t_5aRcWXQV0eb=jYAqavmS1Z-Cw@mail.gmail.com> In-Reply-To: <1398869319.22079.54.camel@revolution.hippie.lan> References: <201404300620.s3U6Kmn6074492@svn.freebsd.org> <1398869319.22079.54.camel@revolution.hippie.lan>
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On Wed, Apr 30, 2014 at 7:48 AM, Ian Lepore <ian@freebsd.org> wrote: > 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. dd if=/dev/zero | tr "\000" "\377" | dd of=<xxx> But it's not quite the same. Cheers, matthew
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