Peter Eriksson wrote:
Has anyone looked into adding support for ZFS ACLs into Rsync? It would be
really convenient if it would support transparent conversions from old-style
Posix ACLs to ZFS ACLs on the fly....
One way Posix->ZFS is probably good enough. I've tried Googling, but haven't
come up with much. There seems to be some kind of built-in conversion function for
just that in the CVS archive for Opensolaris
(http://cvs.opensolaris.org/source/raw/on/usr/src/lib/libsec/common/aclutils.c,
function onvert_aent_to_ace), but is there some public interface one could use?
It should be pretty simple to do. We have acl_get()/acl_set() which are
public interfaces. The acl_set() function will attempt to translate the
ACL when necessary prior to setting it. Translation from POSIX->ZFS
will always work.
Here is an example from compress.c on how to retrieve/set an ACL with
acl_get()/acl_set().
http://cvs.opensolaris.org/source/xref/on/usr/src/cmd/compress/compress.c#1658
Or take a look at how ufsrestore does it. It first has to build an
acl_t structure and then sets the ACL via acl_set().
http://cvs.opensolaris.org/source/xref/on/usr/src/cmd/backup/restore/tape.c#1324
-Mark
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