Per-task file descriptors and eventually a "real" shell

[Joel Sherrill]

On October 4, 2015 8:22:44 PM CDT, Ian Caddy <ianc at goanna.iinet.net.au> wrote:
>Hi Isaac,
>
>On 3/10/2015 4:24 AM, Isaac Gutekunst wrote:
>> Hey,
>>
>>
>> The hack would be that file descriptors 0,1 and 2 are not part of a
>> global namespace of file descriptors, and potentially refer to
>different
>> actual IO devices on a per task basis.
>>
>> The motivation here would be creating a more functional shell and
>> support easy IO redirection for logging, and running multiple shell
>> instances, perhaps via multiple telnet and serial sessions.
>>
>
>Maybe I am missing something, but we do all this currently with the
>shell.
>
>We have a serial port access, and we have multiple telnet / ssh access 
>to our devices providing multiple shells with no problems.
>
>We also redirect the stdio for all the application tasks to print to an
>
>application log instead on the shell.  This is all completely doable 
>now, as as far as I know newlib provides a per task stdin, etc.
>
>Just start your task and point them where you want them to go.

I think there is a support method to close stdio and reopen them. Cc'ing Chris as I think he wrote this.

>regards,
>
>Ian Caddy

--joel