Which tar info page are your referring to? I can't find the documentation you are referencing in the tar source package at all.
That being said I started a discussion about having to use '--xattrs-include=*' when extracting a tar archive with upstream[1] and discovered it was a deliberate decision to include all extended attributes when creating the archive but to only extract the user.* ones by default. Additionally, I've submitted patches upstream to have https://www.gnu.org/software/tar/manual/tar.html#SEC70 updated to reflect tar's behavior. [1] https://lists.gnu.org/archive/html/bug-tar/2019-06/msg00001.html -- Brian Murray @ubuntu.com
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