Re: [PATCH v11 16/48] richacl: Automatic Inheritance

On Fri, Oct 16, 2015 at 6:00 PM, Andy Lutomirski [off-list ref] wrote:

On Fri, Oct 16, 2015 at 8:17 AM, Andreas Gruenbacher
[off-list ref] wrote:

quoted

Automatic Inheritance works as follows:

 - When the RICHACL_AUTO_INHERIT flag in the acl of a file or directory
   is not set, the file or directory is not affected by AI.

 - When the RICHACL_AUTO_INHERIT flag in the acl of a directory is set
   and a file or subdirectory is created in that directory, the
   inherited acl will have the RICHACL_AUTO_INHERIT flag set, and all
   inherited aces will have the RICHACE_INHERITED_ACE flag set.  This
   allows user space to distinguish between aces which have been
   inherited and aces which have been explicitly added.

What if the file or subdirectory that's created in that directory is a
hard link?

Directories cannot have hard links.

When a file is hard linked into multiple directories with different
inheritable permissions, the permissions set last will "win". This
isn't particularly pretty, but it's the way this has worked on that
other operating system with significant marked share for the last
fifteen years.

Thanks,
Andreas
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