NFSv4 ACL support in star

[Joerg Schilling]

Tim Kientzle <kientzle at acm.org> wrote:

> >> Use the usual pathconf(3), with _PC_ACL_NFS4.
> > 
> > This looks like an interface that is not optimized for performance.
>
> If you call it only once per filesystem, the performance is not an issue.
> Libarchive caches filesystem properties as it traverses the tree,
> so it would have no problem with this.

Then you need to call stat() for every file or need to know every mount point, 
that might be a single file...

> But there are also filesystems (AIX, I think) that permit different
> types of ACLs on different files in the same file system.
>
> I would like to see a bit added to stat() indicating the presence of
> either POSIX.1e or NFSv4 ACLs so that clients can efficiently
> determine this on a per-file basis.

SCO UnixWare uses the UFS ACL implementation from SVr4/Solaris but added a
st_aclcnt field in struct stat. Do you have free space in strct stat on BSD?

Jörg

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