[PATCH] shell: Add rtems_shell_dup_current_env to get a default env.

[Sebastian Huber]

On 2014-06-04 12:55, Chris Johns wrote:
> On 4/06/2014 4:28 pm, Sebastian Huber wrote:
>> On 2014-05-29 07:10, Chris Johns wrote:
>>> Remove rtems_current_shell_env as this is dangerous because
>>> the env can be NULL if used outside of a valid shell with the
>>> POSIX key to an env set up.
>>>
>>> Clean up the usage of rtems_current_shell_env.
>>
>> The cleanup looks good, but we should keep the rtems_global_shell_env.
>> I underestimated its widespread use, so it was an error that we removed
>> it.  Now it is a constant, so you can use it only for the initialization
>> with default values.
>>
>
> I would rather this API cleaned up and only a single way for applications to do
> this. It is a simple and clean change.
>
> The change I have uses the environment of a caller if the caller has a specific
> environment in the key else the base it used, ie inherits the environment if
> present.

This is definitely better and we should add this rtems_shell_dup_current_env(), 
but I would nonetheless keep the rtems_global_shell_env for backward compatibility.

-- 
Sebastian Huber, embedded brains GmbH

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