Option to run system commands from automagically

[Former user]

Hi,

It would be great to have the option of creating 'devices' that run shell scripts on the system, write to a file or fetch a web page.

This would be sort of the opposite of the data fetcher, giving a way to trigger software action when some sensor reach a certain value are or a switch is trigerred.

Example: when I 'double click' on off on the remote next to my bed, automagically turns off all lights in the house. It would be great if it could as well run a script that scans the network and turn off computers that I forgot to shutdow.

[Hammes]

+1 An option like this could also trigger ssh commands to shutdown/hibernate other computers in the network, as a very simple option send a suhtdown command in a 1liner

[Thomas Augustsson]

This feature would open up a world of use cases. My closest project where this would be useful is to put a nexa remote next to my light switches to control the sonos audio in that room using a simple sonos python wrapper.

I would love to implement this myself but I did not fully get my head around what needs to be implemented looking at the code. Some pointers in the right direction would be appreciated.

[Thomas Augustsson]

Just want to share a the plugin I made to make this happen.

This is the code I put in sites/plugins/command.py

from django.db import models
import signals.models
import Queue
import os
from settings.models import getSettings

PLUGIN_NAME = 'command'

debug = False

workQueue = Queue.Queue()

global currentSettings
currentSettings = {}

def signalHandler(signal):
    global currentSettings
    if not currentSettings or signal.content.strip() == PLUGIN_NAME + ',configuration,changed':
        currentSettings = getSettings(PLUGIN_NAME)
        print 'configuration updated'
        print currentSettings

    if signal.content == 'terminate':
        workQueue.put(None)

    elif signal.content.startswith('command:'):
        workQueue.put(signal.content[8:].strip())

def threadFunc():
    keepRunning = True
    while(keepRunning):
        try:
            command = workQueue.get()

            if command == None:
                print 'Got a none from command workQueue'
                workQueue.task_done()
                keepRunning = False
                continue

            if debug:
                print 'Runnning command'
                print 'Command:', command

            os.system(command)

            workQueue.task_done()

        except:
            print 'Error executing command command'
            if debug:
                raise

def init():

With this plugin it is possible to run any script with the signal: "command:/path/to/command"