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Re: [Xen-devel] Re: [PATCH] [Xen-users] Problems with pygrub: ValueError

To: Michael Paesold <mpaesold@xxxxxx>
Subject: Re: [Xen-devel] Re: [PATCH] [Xen-users] Problems with pygrub: ValueError:unableto open file
From: Ewan Mellor <ewan@xxxxxxxxxxxxx>
Date: Mon, 3 Apr 2006 18:29:22 +0100
Cc: Xen Devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Xen Users <xen-users@xxxxxxxxxxxxxxxxxxx>
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On Fri, Mar 31, 2006 at 05:28:54PM +0200, Michael Paesold wrote:

> Sorry for the last empty mail (hit the wrong button). Attached is a patch 
> against xen-unstable to improve the error messages in pygrub when the 
> e2fsprogs do not support the newer ext2fs_open2 function. This should help 
> beginners to identify the real problem when pygrub does not work (e.g. on 
> RHEL4).
> 
> Please apply to xen-unstable.
> 
> Best Regards,
> Michael Paesold
> 
> # HG changeset patch
> # User mpaesold@xxxxxx
> # Node ID 6d90c95b919b324b7d8e4c7a568040334c8862e9
> # Parent  f0e14b4e535c7d99c56c286384b0d512c5220884
> Improve pygrub error reporting when opening ext2 fs is not possible
> 
> As reported in the thread:
> http://lists.xensource.com/archives/html/xen-users/2006-03/msg00721.html,
> pygrub does not open ext2 file systems in partitioned images or sub
> partitions on e.g. CentOS/RHEL 4, because e2fsprogs ext2fs_open does not
> support an offset into the file to be opened.
> 
> With this patch, the error is correctly reported instead of a generic
> "unable to open file" (and leaving the user searching in the dark).
> 
> Signed-off-by: Michael Paesold <mpaesold@xxxxxx> 

> # HG changeset patch
> # User mip@xxxxxxxxxxxxxxxxxxxxxx
> # Node ID 6d90c95b919b324b7d8e4c7a568040334c8862e9
> # Parent  f0e14b4e535c7d99c56c286384b0d512c5220884
> Improve pygrub error reporting when opening ext2 fs is not possible
> 
> As reported in the thread:
> http://lists.xensource.com/archives/html/xen-users/2006-03/msg00721.html,
> pygrub does not open ext2 file systems in partitioned images or sub
> partitions on e.g. CentOS/RHEL 4, because e2fsprogs ext2fs_open does not
> support an offset into the file to be opened.
> 
> With this patch, the error is correctly reported instead of a generic
> "unable to open file" (and leaving the user searching in the dark).
> 
> Signed-off-by: Michael Paesold <mpaesold@xxxxxx>

Applied, thanks.

Ewan.

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