linux-kernel - Re: [PATCH 2/2] Add BLKPG_GET

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Message-ID: <20111208123534.GB16493@nb.redhat.com>
Date:	Thu, 8 Dec 2011 13:35:34 +0100
From:	Karel Zak <kzak@...hat.com>
To:	Phillip Susi <psusi@....rr.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] Add BLKPG_GET_PARTITION operation

On Wed, Nov 30, 2011 at 10:23:44PM -0500, Phillip Susi wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> Add a new operation to the BLKPG ioctl to read the partition.
> This allows user space to find the current start and length
> of a partition without having to open the partition and use
> the long depreciated HDIO_GETGEO ioctl.

 $ cat /sys/block/sda/sda1/{size,start}
 4096000
 2048

 ...is probably the best way if you want to avoid problems with
 permissions and deprecated (or all) ioctls :-)

    Karel

-- 
 Karel Zak  <kzak@...hat.com>
 http://karelzak.blogspot.com
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