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From James Peach <>
Subject Re: Persistent volume ownership issue
Date Tue, 21 Jun 2016 23:30:07 GMT
On 21 June 2016 at 12:25, Jie Yu <> wrote:
> James, sticky bit means that there will be no write sharing between two
> users even if the underlying permission allows it. I'd prefer not having
> this restriction:)

No, it just prevents users renaming or deleting each others files.

If you want multiple users to be able to write to the same files, they
need to create with the right ownership.

>> I wonder whether ACLs are the right solution to volume ownership?
>> Certainly I think inherited ACLs are a good solution for expressing a
>> consistent access control policy over a hierarchy (at least in the
>> Windows/Darwin/SMB/NFSv4/RichAcl ACL model).
> Are you suggesting that we don't expose the underlying unix user directly to
> frameworks. Instead, expressing permissions and ownerships using ACLs?

Well that could be an option, though I'm mainly thinking out loud.
With shared volumes, it seems like you really want an access control
policy that applies to the volume, rather than requiring processes to
collaborate at a file granularity. One way to do that would be to make
the owner the creator of the volume, then use ACL inheritance to grant
additional access to other users. You'd have to reflow the
inheritance, but it could probably done.

James Peach |

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