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List:       netbsd-tech-kern
Subject:    Re: rwd0a and label sector marked read-only
From:       Jean-Yves Migeon <jean-yves.migeon () espci ! fr>
Date:       2008-12-17 14:19:36
Message-ID: 49490A78.6030609 () espci ! fr
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Izumi Tsutsui wrote:
> All partitions (except RAW_PART) are defined in the disklabel,
> so it might be problematic to define behavior when
> the disklabel is updated via a partition which is being changed. 
> 
>> - why EROFS and not EPERM?
> 
> Because it requires a proper procedure (DIOCWLABEL), not privilege?

Well, disklabel(8) mentions for -W option:

"Allow writes to the disk sector that contains the label."

For me "allow/disallow" is more tied to a permission than a read/write 
state, that's why I am asking. But I am no native speaker :)

Besides, returning EROFS might be misleading for the user, as it informs 
that the fs is read-only, which is partly correct here (having one 
sector marked read-only does not necessarily mean that the rest is in 
the same state).

Thanks for the answers.

-- 
Jean-Yves Migeon
jean-yves.migeon@espci.fr

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