[riot-notifications] [RIOT-OS/RIOT] tools/serial: add support for socat as riot terminal (#11034)

Alexandre Abadie notifications at github.com
Wed Feb 20 08:39:41 CET 2019


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### Contribution description

This PR provides support for `socat` as an alternative RIOT terminal tool. It was inspired by #11003.

The good thing with socat is that it allows redirecting the serial port to anything: the current shell, a TCP server, etc. The default behaviour is to redirect to the current shell like other tools. But it's possible to provide the SOCAT_OUTPUT variable with custom output parameters.

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### Testing procedure

- Just build and flash any application for a given board with a shell
- Open the terminal using socat:
```
$ RIOT_TERMINAL=socat make BOARD=saml11-xpro -C examples/default/ flash term
> help
```
- Try the redirection to a different output, here a local TCP server:
```
$ SOCAT_OUTPUT=TCP4-LISTEN:20000,reuseaddr RIOT_TERMINAL=socat make BOARD=saml11-xpro -C examples/default/ flash term
```
- You can access the shell using netcat from another terminal (this is exactly what is done in IoT-LAB for instance):
```
$ nc localhost 20000
> help
```
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### Issues/PRs references

Inspired by #11003 

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You can view, comment on, or merge this pull request online at:

  https://github.com/RIOT-OS/RIOT/pull/11034

-- Commit Summary --

  * tools/serial: add support for socat as riot terminal

-- File Changes --

    M makefiles/tools/serial.inc.mk (4)

-- Patch Links --

https://github.com/RIOT-OS/RIOT/pull/11034.patch
https://github.com/RIOT-OS/RIOT/pull/11034.diff

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