Access Control for RTEMS Shell

Peter Dufault dufault at
Wed Nov 19 22:54:21 UTC 2014

Are the UID and GID per-thread?  I assume two different telnet sessions would have different credentials.

I strongly agree that there is a need for credentials in embedded applications, but I don't see that they can be tied to the RTEMS shell.  I'm not sure how UID and GID work in a single process POSIX thread environment and the little google searching I did ended up with Linux extensions.

Do the credentials apply to file opens or message queue opens?

> On Nov 19, 2014, at 02:20 , Sebastian Huber <sebastian.huber at> wrote:
> The goal is to provide different command sets for different users. For 
> example a system could give the customer a certain command set and the 
> service personal a different one which includes also maintenance operations.
> Most of the infrastructure was already present.  There were just some 
> missing links in between.
> On 18/11/14 16:11, Gedare Bloom wrote:
>> Could you briefly explain a bit more context about the goals for
>> implementing access control? That is, is it for compliance to some
>> standard, to address a security need, or something else?
>> Thanks,
>> Gedare
>> On Tue, Nov 18, 2014 at 9:37 AM, Sebastian Huber
>> <sebastian.huber at> wrote:
>>> This patch set adds access control to the RTEMS shell.  The command visibility
>>> and ability to execute are determined by the current user environment and per
>>> command mode, UID and GID values.  The user environment is set up by the
>>> rtems_shell_login_check() handler.  Commands to alter the mode, UID and GID of
>>> commands are added.
>>> _______________________________________________
>>> devel mailing list
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> -- 
> Sebastian Huber, embedded brains GmbH
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Peter Dufault
HD Associates, Inc.      Software and System Engineering

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