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Re: [Qemu-devel] [PATCH 1/6 v10] docs: spec for add-cow file format

From: Eric Blake
Subject: Re: [Qemu-devel] [PATCH 1/6 v10] docs: spec for add-cow file format
Date: Mon, 18 Jun 2012 09:33:20 -0600
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:13.0) Gecko/20120605 Thunderbird/13.0

On 06/17/2012 08:08 PM, Dong Xu Wang wrote:

>>>> Mention that if this is not 0, then it must be between 36 and 4094 (a
>>>> file name must be at least 1 byte).  What are the semantics if the
>>>> filename is relative?
>>> relative filename is ok, I tested it just now.
>> I believe Eric wanted to know what a relative path means, i.e. that it's
>> relative to the image file rather than relative to the working directory.
> Now it is relative to working directory.

Yuck.  So I have to change directories before opening an add-cow image
in order to interpret it the same way as the creator?  You really need
to fix this to be like qcow2 backing files; relative path names there
are interpreted relative to the qcow2 file, not to the current working
directory of the process that opened the qcow2 file.

Eric Blake   address@hidden    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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