[PATCH rtems-tools] rtemstoolkit: Fix shlex.split to use posix mode and add unit test for pipe operation

[Chris Johns]

On 21/6/2023 2:22 pm, Muhammad Sulthan Mazaya wrote:
>> On 21/6/2023 11:55 am, Muhammad Sulthan Mazaya wrote:
>> > Turns out subprocess.Popen operates on posix mode.
>>
>> Is this true for non-POSIX systems?
>>
>> Where is this documented?
> 
> It's not, turns out it is also dependent on the system too. It is documented
> here https://docs.python.org/3/library/subprocess.html#subprocess.Popen
> <https://docs.python.org/3/library/subprocess.html#subprocess.Popen>. Should I
> add a check like this instead?

I think this is more important:

https://docs.python.org/3/library/shlex.html

I think removing `posix=` from the argument as in your first patch makes our
command parsing conform to POSIX and that seems like a good thing for us.

I will apply the first patch.

Thanks
Chris