Re: [Bug-tar] xattr support on Linux

[Joerg Schilling]

Pavel Raiskup <address@hidden> wrote:

> > BTW: converting name/value pairs with unknown meaning into something
> > different (as UTF-8) may cause problems and is not needed as the meta
> > data in extended tar headers is binary clean due to it's length tag.
>
> Jorg, the problem is that the character '=' may really cause problems.
> Stored xtended keyword and value are binary clean but there is no
> unambiguous method how to restore xattr pax header when the keyword
> contains '=' character(s).
>
> Do you think that the solution here is suitable also for star?
>
>   http://lists.gnu.org/archive/html/bug-tar/2012-10/msg00025.html
>
> I definitely don't want to make any incompatibilities in that case between
> GNU tar and star -- but I think that this issue has to be solved somehow.
> Do you have a better idea?

AFAIK, the Linux xattr names are not living in the filesystem but inside files, 
so I would assume that there are other rules for them.

A related OS implementation should from my view disallow '=' inside a the name 
of a name=value pair, but if this conceptional problem is not fixable at the 
right location anymore, I would prefer to just encode '=' and '%'.

Jörg

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