dynamic context transitions

Russell Coker russell at coker.com.au
Mon Nov 8 14:39:23 GMT 2004

On Tuesday 02 November 2004 07:35, Luke Kenneth Casson Leighton 
<lkcl at lkcl.net> wrote:
> > Is there any reason why smbd can't exec a simple helper application in
> > the required context which only does what needs to be done?
>  no there is no reason why [a helper application should] not [be used].
>  i am not sure if the simple solution [that andrew and russell
>  came up with] was fully enumerated: it involves exec'ing a
>  per-user helper application which does a setuid.
>  the helper application opens files as-and-when they are needed,
>  [and also does mkdirs? and rmdirs?] and then passes the file

Yes, it would also do mkdir, rmdir, link, unlink, rename, and symlink.  For 
best functionality it would do stat, but that would have performance issues 
or require file handle caching code which would be more work to write and 

http://www.coker.com.au/selinux/   My NSA Security Enhanced Linux packages
http://www.coker.com.au/bonnie++/  Bonnie++ hard drive benchmark
http://www.coker.com.au/postal/    Postal SMTP/POP benchmark
http://www.coker.com.au/~russell/  My home page

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