Re: [PATCH] Use xattr (Linux) in qcopy-acl.c

[Paul Eggert]

On 1/12/23 12:58, Bruno Haible wrote:
>    1. remove the ALLOWing part of the old ACL,
>    2. add the DENYing part of the new ACL,
>    3. copy the data,
>    4. remove the DENYing part of the old ACL (as far as not also contained
>       in the new ACL),
>    5. add the ALLOWing part of the new ACL.
>
> Something like that, no?

Yes, this sounds good, although things are more complicated on systems 
where ACLs and the traditional Unix permissions are set separately and 
the two interact.