sispmctl – light (on|off|toggle|state)

Hello,
this is a followup to the posts sispmctl and sispmctl – using it as non root . With this script we can switch the light on and off, toggle it and check the current state.

This shell script shows how to

• check the parameters
• use or with if
• use echo without creating a new line
• use sispmctl

Here we go:

#!/bin/sh
# light
# 20110112 crissa for http://blog.rotten.li

if [ "$#" == "1" ]
then
  if [ "$1" == "on" ] || [ "$1" == "-o" ]
  then
    if [ `sispmctl -q -n -g 1` == "0" ]
    then
      sispmctl -q -o 1
      echo "light: switched on"
  
      sleep 3
    else
      echo "light: the light is on"
    fi
  elif [ "$1" == "off" ] || [ "$1" == "-f" ]
  then
    if [ `sispmctl -q -n -g 1` == "1" ]
    then
      sispmctl -q -f 1
      echo "light: switched off"
  
      sleep 3
    else
      echo "light: the light is off"
    fi
  elif [ "$1" == "toggle" ] || [ "$1" == "-t" ]
  then
    echo "light: toggle"
    sispmctl -q -t 1
    echo -n "light: the light is "
    sispmctl -q -g 1
  
    sleep 3
  elif [ "$1" == "state" ] || [ "$1" == "-s" ]
  then
    echo -n "light: the light is "
    sispmctl -q -g 1
  else
    echo "light (on|off|toggle|state)"
  fi
else
  echo "light"
  echo "light on     or light -o to switch light on"
  echo "light off    or light -f to switch light off"
  echo "light toggle or light -t to toggle light"
  echo "light state  or light -s to get light state"
fi

# eof

The script checks the current state before it switches the light on or off. Why switch the light on if it is already on? At the moment I don’t know how toggle could ever be useful. But the current state is useful if you aren’t in the same room as the power outlet and the light!
Bye, Tore