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#!/bin/sh

     

       
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# Change the LEDs of a DualShock4 Controller

     

       
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usage() {

     

       
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	printf '%s\n' "usage: ${0##*/} hex|rgb color" \

     

       
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	              "${0##*/} accepts hex values (ffffff) or rgb values (255,255,255)"

     

       
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}

     

       
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[ "$2" ] || { usage; exit 1; }

     

       
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hex2rgb() {

     

       
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	hex=$1

     

       
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	hex_r=${hex%????}

     

       
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	hex_g=${hex#??}; hex_g=${hex_g%??}

     

       
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	hex_b=${hex#????}

     

       
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	printf '%d,%d,%d' "0x$hex_r" "0x$hex_g" "0x$hex_b"

     

       
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}

     

       
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ds4leds() {

     

       
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	vendorid="054C"

     

       
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	led_path="/sys/class/leds"

     

       
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	case $led_path/* in

     

       
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		"$led_path/"*"$vendorid:05C4"*":global" ) productid="05C4" ;;

     

       
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		"$led_path/"*"$vendorid:0BA0"*":global" ) productid="0BA0" ;;

     

       
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	esac

     

       
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	IFS=, read -r r g b <<-EOF

     

       
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	$1

     

       
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	EOF

     

       
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	printf '%s' "$r" | tee "$led_path/"*"$vendorid:$productid"*":red/brightness" > /dev/null

     

       
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	printf '%s' "$g" | tee "$led_path/"*"$vendorid:$productid"*":green/brightness" > /dev/null

     

       
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	printf '%s' "$b" | tee "$led_path/"*"$vendorid:$productid"*":blue/brightness" > /dev/null

     

       
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}

     

       
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case $1 in

     

       
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	hex      ) ds4leds "$(hex2rgb "$2")" ;;

     

       
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	rgb      ) ds4leds "$2" ;;

     

       
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	*h|*help ) usage; exit 0 ;;

     

       
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esac