#!/bin/bash

pre_loc_state=0
loc=256
sys=256
fan=256
psu=256

byte_hex_test()
{
	if ! [[ $1  =~ ^[0-9A-Fa-f]{2}$ ]] ; then
		return 0
	else
		return 1
	fi
}

bmc_led_read()
{
	led_state=0
	val=$(ipmitool raw 0x30 0x25 0x00 0x60 0x1 0x81 2>>/dev/null)
	res=$?
	val=$(echo $val | awk '{printf $1}')
	byte_hex_test $val
	if [ $? -eq 0 ]; then
		return 0
	fi
	val=$( printf "%d" 0x$val )
	loc=$(($val & 0x3))
	sys=$((($val & 0xc) >> 2))
	fan=$((($val & 0x30) >> 4))
	psu=$((($val & 0xc0) >> 6))

	return 1
}

bmc_led_write()
{
	ipmitool raw 0x30 0x42 $1 1>>/dev/null 2>>/dev/null
}

LED_monitor()
{
	local loc_state=0

	while true
	do
		if [ -e /sys/bus/i2c/devices/0-0030/sys_led ];then
			loc_state=$(cat /sys/bus/i2c/devices/0-0030/loc_led | awk '{printf $1}')
			if [ $loc_state -gt 1 ]; then
				loc_state=1
			fi
			if [ $loc_state != $pre_loc_state ]; then
				bmc_led_write $loc_state
				pre_loc_state=$loc_state
			fi

			bmc_led_read
			if [ $? -eq 1 ];then
				echo $sys > /sys/bus/i2c/devices/0-0030/sys_led
				echo $fan > /sys/bus/i2c/devices/0-0030/fan_led
				echo $psu > /sys/bus/i2c/devices/0-0030/psu_led
			fi
		fi

		sleep 2
	done
}

LED_monitor