Date: Sun, 1 Oct 2000 23:32:29 +1100 (EST) From: Bruce Evans <bde@zeta.org.au> To: Greg Lehey <grog@lemis.com> Cc: "Karsten W. Rohrbach" <karsten@rohrbach.de>, Andre Albsmeier <andre@akademie3000.de>, Marc Tardif <intmktg@CAM.ORG>, freebsd-fs@FreeBSD.ORG, freebsd-scsi@FreeBSD.ORG Subject: Re: ccd with other filesystems Message-ID: <Pine.BSF.4.21.0010012311270.5871-100000@besplex.bde.org> In-Reply-To: <20001001114540.G43885@wantadilla.lemis.com>
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On Sun, 1 Oct 2000, Greg Lehey wrote:
> On Sunday, 1 October 2000 at 4:09:37 +0200, Karsten W. Rohrbach wrote:
> > i dont quite know why it is still possible doing a newfs on a 'c'
> > partition, since the partition type is 'unused' and not
> > '4.2BSD'. newfs should check this and throw an error while providing
> > an expert-only-feature command line option to explicitly override
> > it.
>
> I think this is a bug in newfs.
This is a feature of newfs. It is almost device-independent. E.g., to
create a filesystem in a regular file with no label in sight:
dd if=/dev/zero of=foo oseek=2779 count=1
# -v and ./foo work around device dependence.
# -T floppy is so that I don't have to type a lot of args for this example.
newfs -v -T floppy ./foo
> It should only create file systems on
> partitions of type 4.2BSD. Does anybody disagree? Otherwise I'll fix
> it.
Disagree. The filesystem type field is normally an output of newfs, not
an input.
> > it is a bad thing[tm] to be able to wedge every single blockdev in your
> > system by (ab)using newfs.
>
> Agreed.
Disagree. It is a feature that write(2) works on disk devices (block
devices went away) no matter how it is (ab)used. (There should be
more write protection for mounted partitions, but a disk without any
of its partitions mounted should be almost just a file.)
Bruce
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