openwrt/target/linux/bcm53xx/base-files/etc/diag.sh

#!/bin/sh
# Copyright (C) 2014 OpenWrt.org

. /lib/functions/leds.sh

get_status_led() {
	local status_led_file

	# There may be more than one color of power LED, try to avoid amber/red
	status_led_file=$(find /sys/class/leds/ -name "*:power" -a ! -name "*:amber:*" -a ! -name "*:red:*" | head -n1)
	if [ -d "$status_led_file" ]; then
		status_led=$(basename $status_led_file)
		return
	fi;

	# Now just pick any power LED
	status_led_file=$(find /sys/class/leds/ -name "*:power:*" | head -n1)
	if [ -d "$status_led_file" ]; then
		status_led=$(basename $status_led_file)
		return
	fi;
}

set_state() {
	get_status_led

	[ -z "$status_led" ] && return

	case "$1" in
	preinit)
		status_led_blink_preinit
		;;
	failsafe)
		status_led_blink_failsafe
		;;
	preinit_regular)
		status_led_blink_preinit_regular
		;;
	done)
		status_led_on
		;;
	esac
}