[oe] why rootfs directory in temp is empty

[Guo Hongruan]

Yea, I understand. Thanks a lot.

I used to check the rootfs directory quickly, to verify whether or not  
some packages have been installed correctly and to check the rootfs size.  
So when I can not find it as usual, I am amazing.

Thank all of you.

在 Wed, 23 Dec 2009 09:07:42 +0800，Khem Raj <raj.khem at gmail.com> 写道:

> On Tue, Dec 22, 2009 at 2:46 PM, Philip Balister <philip at balister.org>  
> wrote:
>> On 12/22/2009 05:25 PM, Frans Meulenbroeks wrote:
>>>
>>> 2009/12/22 Denys Dmytriyenko<denis at denix.org>:
>>>>
>>>> On Tue, Dec 22, 2009 at 09:05:31AM -0600, Mike Westerhof wrote:
>>>>>
>>>>> Guo Hongruan wrote:
>>>>>>
>>>>>> Hi guys,
>>>>>>   Today, I build an base-image using OE. And I want to check the
>>>>>> content
>>>>>> of rootfs, but I found the directory rootfs in building directory is
>>>>>> empty. I remember there was the ontent of the target root  
>>>>>> filesystem.
>>>>>> Why have to remove them? Does it means the rootfs directory is
>>>>>> unuseful?
>>>>>>
>>>>>> Thanks a lot!
>>>>>>
>>>>>
>>>>> Add IMAGE_KEEPROOTFS = "1" to your local.conf file.
>>>>> I'm not sure why the change was made to clean it out every build,
>>>>> though.
>>>>
>>>> To prevent people from using it as an NFS share and having problems.
>>>
>>> Ehm, can you please clarify why this would cause a problem?
>>> (btw if I recall correctly the rootfs is still there in the work dir,
>>> and anyway you can build a rootfs in a tar.gz file and untar that).
>>
>> Someone correct me if I get this wrong ...
>>
>> Since OE does not run as root, the file ownership are not suitable for  
>> use
>> as a true rootfs. During the assembly of the tarball, the file owner
>> information is "fixed" so that if you unpack the tarball as root, the  
>> files
>> have the proper owners.
>>
>> So the temporary root file system will not do what people expect.
>
> This is the real cause. Always use the tar file to populate the
> root file system even if it is to be nfs mounted
>
> -Khem
>
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