Re: [Bug-tar] xattr support on Linux

[Joerg Schilling]

Tim Kientzle <address@hidden> wrote:

>
> On Oct 3, 2012, at 5:01 AM, Pavel Raiskup wrote:
>
> >> FWIW, both star and bsdtar support xattrs on Linux.
> >> 
> >> It would be nice if GNU tar were compatible with those existing
> >> implementations.
> > 
> > Thanks Tim, yes -- xattr-patched GNU tar would be unable to extract
> > extended attributes from archives created by BSD tar now.  In BSD tar
> > pax headers you are using base64 encoding for xattr values *but* in
> > different namespace --> so it will be very easy to allow GNU tar unpack
> > also BSD tar archives.  I missed that fact and I'll address that later.
>
> Thanks!
>
> bsdtar also URL encodes the xattr name when building the pax property
> name.  This ensures the final key will be entirely ASCII (and hence will
> not cause any problems with readers that expect all keys to be valid UTF-8).
>
> I can point you to the code in libarchive that handles this if you want
> a detailed reference.  (The code is BSD-licensed; you're welcome
> to copy it if you wish.)

Mmm, is bsdtar incompatible to star?

Do you have a documentation for your format?

Jörg

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