posix acl

[Greg Silverman]

>From Windows clients I see many getxattr calls for
"system.posix_acl_permissions" and "system.posix_acl_default". At this
time, I return EOPNOTSUPP for  system directories and ENODATA for others.

If the format of responses to these calls was ASCII, like,
"u:rwx;g:rw-;o:--x", I could return the permissions in the char * buffer.
What is the format of those responses?

On Fri, Feb 12, 2016 at 6:50 PM Richard Sharpe <realrichardsharpe at gmail.com>
wrote:

> On Fri, Feb 12, 2016 at 6:40 PM, Greg Silverman <silvermangb at gmail.com>
> wrote:
>  > I create them. I use fuse to create a virtual file system. Those
> attribute
> > only have the meaning I give them. I determine at runtime which
> privileges a
> > user has for any file or folder, independent of permission in the
> physical
> > storage. That is, if I knew the binary format used to represent
> permissions.
>
> OK, but in the FUSE model you are presented with a GETXATTR or
> SETXATTR requests. To interpret them seems more than you are supposed
> to do.
>
> Of course, I suppose it depends on the target file system and how do
> you handle the case where the admin is using acl_xattr and you are
> presented with XATTRs that are encoded Security Descriptors?
>
> > On Fri, Feb 12, 2016 at 6:35 PM Richard Sharpe <
> realrichardsharpe at gmail.com>
> > wrote:
> >>
> >> On Wed, Feb 10, 2016 at 2:55 PM, Greg Silverman <silvermangb at gmail.com>
> >> wrote:
> >> >
> >> > I am developing with fuse. What are the binary formats for posix acls
> &
> >> > security settings? Where can I find these so I can respond to the
> xattr
> >> > calls correctly?
> >>
> >> Hmmm, surely, as a file system developer they are opaque blobs.
> >>
> >> That is, you don't care what the format of those blobs is. You simply
> >> store them or retrieve them?
> >>
> >> Am I missing something here?
>
> --
> Regards,
> Richard Sharpe
> (何以解憂？唯有杜康。--曹操)
>