fuse - how to "mirror" user_t file access rights?

[Luke Kenneth Casson Leighton <lkcl@lkcl.net>]

hi,

does anyone have any ideas on how to mirror the exact same file
permissions as a user_t or sysadm_t or staff_t... in another domain?

i'm writing a policy for a fuse program (fusexmp) and yes i'm also
modifying the fuse kernel module to support xattrs.

the issue is as follows:

- a macro similar to mount_domain called fusexmp_domain creates a domain
  $2_fusexmp_t from its argument e.g. user -> user_fusexmp_t.

- user_t running the fusexmp_exec_t program causes a domain_auto_trans
  into user_fusexmp_t.

- any user file access on, say /Documents/foo will result in
  /usr/bin/fusexmp doing a corresponding file access on
  /home/yourusername/foo...

  ... but as explained above, this access is done in the
  user_fusexmp_t domain

i found the privhome domain thing but russell said "no way!"
because privhome allows access to *alll* user domains.

does anyone know if there is a half-way-house that i can use,
which will grant access to just the given user's files and
directories, as if it was that user doing the access?

ta,

l.

--
--
Truth, honesty and respect are rare commodities that all spring from
the same well: Love.  If you love yourself and everyone and everything
around you, funnily and coincidentally enough, life gets a lot better.
--
<a href="http://lkcl.net">      lkcl.net      </a> <br />
<a href="mailto:lkcl@lkcl.net"> lkcl@lkcl.net </a> <br />


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