Dear Maintainer,

since version 1.27 tar honours ACLs and filesystem xattrs ( https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=254615 )

Many users would expect, that

    tar c --directory orig/ . | tar x --directory restore/

would backup and restore files including permissions correctly. But that is not the case:

Create two directories and a file with acls and xattrs on a filesystem that supports them:

    mkdir orig restore
    touch orig/file_with_acl_capability_and_user_xattr
    setcap cap_net_raw=p orig/file_with_acl_capability_and_user_xattr
    setfattr -n user.testkey -v testvalue orig/file_with_acl_capability_and_user_xattr
    setfacl -m u:nutzer23:rwx orig/file_with_acl_capability_and_user_xattr

Check whether xattrs and acls are there:

    getfattr -m . -d orig/file_with_acl_capability_and_user_xattr
    getfacl          orig/file_with_acl_capability_and_user_xattr

Create a simple backup with tar:

    tar c --directory orig/ . | tar x --directory restore/

Check whether xattrs and acls are still there:

    getfattr -m . -d restore/file_with_acl_capability_and_user_xattr
    getfacl          restore/file_with_acl_capability_and_user_xattr

Thats not the case.

The authors of the acl and xattr patch were aware of this problem, but decided not to solve it:
https://bugzilla.redhat.com/show_bug.cgi?id=771927#c24