lkml.org 
[lkml]   [2000]   [Feb]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Capabilities
On Sun, Feb 20, 2000 at 09:42:22PM -0300, Horst von Brand wrote:
> Pavel Machek <pavel@suse.cz> said:
> > In-Reply-To: <200002192338.e1JNcw216382@sleipnir.valparaiso.cl>; from vonbrand@
> > ***sleipnir.valparaiso.cl on Sat, Feb 19, 2000 at 08:38:58PM -0300
>
> > > > If you want to elevate some priviledges, make it setuid 0 (that will
> > > > give it all capabilities) and you can now copy forced into
> > > > allowed. You are done. You have nice compatibility (ls) for free, and
> > > > you have 32 more bits for your use!
>
> > > Who says running as UID == 0 gives you all capabilities? Why have a
>
> > Backwards compatibility.
>
> Doesn't cut it: It is _exactly_ what capabilities are designed to avoid.
> You can get (some) backwards compatibility by setting capabilities
> adequately.

I thin we should do it so, but this is a userlevel featue.
We should ad a rc file /etc/capabilitys with following content:

capabyility:passwd:initialusers
| |
| | users, whiches login-shell inherits this cap form login
| the passwd you need to get this cap ( like IRIX su -C <cap> )



>
> > > distinguished root user at all? OTOH, it does make sense to have a program
> > > that can modify files belonging to DNS, and which is allowed to bind to a
> > > low port, but nothing else. The UID/GID (and ACL) stuff and capabilities
> > > are complementary.
>
> > I said that different uid is where this gets ugly ;-). Take a look at
> > elfcap.

I think we should get elfcap into the kernel before 2.4. In 2.5 we can replace it with
properly integration of capabilitys in the filesystem.

Christoph

--
Always remember that you are unique. Just like everyone else.

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:56    [W:1.031 / U:0.008 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site