Toggle monitor input from keyboard in linux

toggle_monitor_input.sh

#!/usr/bin/env bash

#TODO:  call ddcutil detect and parse output for actual devices; only constants should be VCP code and vars 
#       related to ddcutil

BUS_FLAG="-b"
I2C_ID=5
CMD="ddcutil"
GETTER=getvcp
SETTER=setvcp
DP=15
HDMI=17
NOCHCK="--nodetect --noverify"
VCP=0x60

function main()
{
  getout=$( sudo $CMD $NOCHCK $BUS_FLAG $I2C_ID $GETTER $VCP )
  if [[ $getout == *DisplayPort* ]]
  then 
    eval sudo $CMD $NOCHCK $BUS_FLAG $I2C_ID $SETTER $VCP $HDMI
  elif [[ $getout == *HDMI* ]]
  then
    eval sudo $CMD $NOCHCK $BUS_FLAG $I2C_ID $SETTER $VCP $DP
  fi
}

main

exit 0