Re: Is it possible to assign different labels to symbolic links and actual files?

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On 05/24/2011 05:46 PM, Sam Gandhi wrote:
> On Tue, May 24, 2011 at 2:07 PM, Daniel J Walsh <dwalsh@xxxxxxxxxx> wrote:
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>> On 05/24/2011 04:46 PM, Sam Gandhi wrote:
>>> Hello,
>>>
>>> I am working on a embedded platform and we have busybox on this device.
>>>
>>> What we would like to do do is assign diffrent labels to various
>>> busybox links. What we have seen when running things on JFFS2 when I
>>> label a symbolic link, the actual file gets the label, but the link
>>> itself doesn't (according to ls -lZ output).  We have seen similar
>>> behaviour with files on tmpfs as well.
>>>
>>> ls -lZ
>>> -rw-r--r--        1         0 Jan  1 00:12 system_u:object_r:myfile_t X
>>> lrwxrwxrwx    1         1 Jan  1 00:13 user_u:object_r:tmpfs_t          Y -> X
>>>
>>> Is there no way to assign different label to symlink and actual files?
>>> Is this file-system specific issue? Are there any file-system that
>>> support assigning seperate labels to symlink and actual file?
>>>
>>> -Sam
>>>
>>> --
> 
>>>
>>>
>> Yes you can label symbolic links differently then their targets, how are
>> you assiging the labels?
>>
> 
> I am using setfilecon program found in package
> On tmpfs file I did :
> 
> cd /tmp/
> touch X
> ln -s X Y
> setfilecon system_u:object_r:myfile_t Y
> 
> And I see ls -lZ output as I shown above which shows /tmp/X has the
> myfile_t label and not Y
> 
> I can't really use tools like semanage 'cause I can't install python
> on this system. I will try to "reverse" engineer what semanage does
> and how it handles symlink v/s regular files.
> 
> -Sam
Use chcon instead of setfilecon
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