[clue-tech] [spam?] Re: ext3 and immutable symlink?

[Jim Ockers]

Hi David,

Ya I should have mentioned as part of the variety of systems I've tried 
it on, I was as root sometimes and that doesn't work either.

Jim

David L. Willson wrote:
> Not a solution, but more information.  Privilege appears to be relevant.
> The "operation not permitted" message seems to be because you're not a privileged user.
> Root gets "operation not supported" instead.
> Regular users can add immutable, but can't remove it.  :-?
> $ touch test
> $ ln -s test testlink
> $ chattr +i test
> chattr: Operation not permitted while setting flags on test
> $ chattr +i testlink
> chattr: Operation not supported while reading flags on testlink
> $ lsattr test*
> -----------------e- test
> lsattr: Operation not supported While reading flags on testlink
> $ sudo chattr +i test
> $ sudo chattr +i testlink 
> chattr: Operation not supported while reading flags on testlink
> $ lsattr test*
> ----i------------e- test
> lsattr: Operation not supported While reading flags on testlink
> $ 
>
> David L. Willson
> Trainer, Engineer, Enthusiast
> MCT MSCE Network+ A+ Linux+ LPIC-1 NovellCLA UbuntuCP
> tel://720.333.LANS
> Freeing people from the tyranny (or whatevery) of Microsofty-ness
>
> ----- "Jim Ockers" <ockers at ockers.net> wrote:
>
>   
>> Hi CLUEbies,
>>
>> I want to replace a normal file in a directory with a symlink to
>> somewhere else. I also want this change to be permanent and immutable;
>> that is, I want nothing and nobody to be able to get rid of the
>> symlink and rewrite it with a normal file. Unfortunately it seems that
>> chattr on ext{23} will not let me make a symlink be an immutable part
>> of a directory entry.
>>
>> $ touch oldfile
>> $ ln -s oldfile newfile
>> $ ls -al newfile
>> lrwxrwxrwx 1 ockers ockers 7 Mar 31 13:54 newfile -> oldfile
>> $ chattr +i newfile
>> chattr: Operation not permitted while setting flags on newfile
>>
>> I've tried this a bunch of times on a variety of systems. Sometimes it
>> applies the chattr attribute to the oldfile, sometimes it just throws
>> an error, on CentOS too. Can anyone suggest a reliable way to make my
>> symlink itself immutable without having chattr try to apply the change
>> in attributes to the target of the symlink?
>>
>> I can't make the directory itself immutable because that will break
>> too many things I think.
>>
>> Thanks,
>> Jim
>> --
>> Jim Ockers, P.Eng. ( ockers at ockers.net )
>> Contact info: http://www.ockers.ca/pason.html 
>> _______________________________________________
>> clue-tech mailing list
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>>     
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-- 
Jim Ockers, P.Eng. (ockers at ockers.net)
Contact info: http://www.ockers.ca/pason.html


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