Meaning of "This file uses advanced permissions"?

[Alan Dacey Sr.]

On Wednesday, December 29, 2010 12:53:10 pm D. R. Evans wrote:
> I have been experiencing a strange problem with amarok for perhaps the last
> six months: a few files don't play properly (they used to play fine), and
> cause amarok to skip some number of items on the playlist, including the
> file in question.
> 
> For a long time I couldn't see anything different about the files that were
> causing this to happen, but I now see that when I look at the properties of
> the files they all say "This file uses advanced permissions". And yet when
> I look at what permissions are actually set, it is the usual: "-rwxr--r--",
> no different (as far as I can see) from other files that don't claim to be
> using advanced file permissions. Simnilarly, lsattr just gives
> "-------------------": nothing special there.
> 
> I could (presumably) fix this by explicitly running a recursive chmod over
> the entire hierarchy of music files, but before I try that I would like to
> try to understand what is going on.
> 
> Googling wasn't much help, at least using the search terms I tried.
> 
> So I think my question is: what does the message "This file uses advanced
> permissions" actually mean?
> 
> And probably a second question is: in Kubuntu what is the right way to turn
> off advanced file permissions for a file, other than running an explicit
> command-line chmod (I'm assuming that will work)? The dialogue boxes don't
> seem to offer that capability.
> 
> FWIW, I have no idea why these files are different from all the others that
> work fine, nor why amarok seems to have a bit of a fit when it tries to
> play them, now why the behaviour of amarok is different from what it used
> to be, but those are all secondary questions; really I'd just like to
> understand what's special about these files, especially since "ls -al" and
> "lsattr" don't seem to show show anything different about them.
> 
>   Doc
> 
> 

In Dolphin, right-click the file, pick Properties.  Under the Permissions tab there 
is an 'Advanced Permissions' button.
Is there anything different about the problem files than a good file?  The advanced 
permissions have to do with uder and group IDs, not sure how they really work, I never 
needed them.

-
Alan