Automatically mirror main display to other connected displays

automirror

#!/bin/bash
if [ "$#" -lt 2 ]; then
    if [ "$#" -eq 1 ]; then
        DISPLAYS=`xrandr | grep " connected" | sed "s/ .*$//" | grep -v "$1"`
        DISPLAYS="$1 $DISPLAYS"
    else
        DISPLAYS=`xrandr | grep " connected" | sed "s/ .*$//"`
    fi

    ARR_DISPLAYS=( $DISPLAYS )
    NUM_DISPLAYS=${#ARR_DISPLAYS[@]}

    if [ $NUM_DISPLAYS -ge 2 ]; then
        exec $0 $DISPLAYS
    else
        echo Only $NUM_DISPLAYS display found
        exit 1
    fi
else
    MAIN=$1
    CMD="xrandr --output $MAIN --auto"
    shift
    for d in "$@"
    do
       CMD="$CMD --output $d --auto --same-as $MAIN"
    done
    notify-send "$CMD"
    exec $CMD
fi