#!/bin/sh
#
# This script is executed at the start and end of each run-level
# transition.  It is the first 'stop' script and the last 'start'
# script.
#
# 'stop'  sets the correct colour power LED to flash between the
#         two colours of the previous and next runlevel.
# 'start' sets the LED to steady
#
# 'red'   is the initial setting on kernel boot
#
# 'amber' is used for run levels S (from /linuxrc), 0 (halt),
#         1 (single user) and 6 (reboot).  halt and reboot do not
#         terminate therefore the LED remains flashing until the
#         kernel terminates.
#
# 'green' is used for run levels 2-5 - the normal user run levels.
#
# colours are 'g' (green), 'r' (red) or 'gr' (amber).
colour() {
	case "$1" in
	S|0|1|6) echo gr;;
	2|3|4|5) echo g;;
	N)       echo r;;
	*)       echo "led change: $runlevel: runlevel unknown" >&2
		 echo r;;
	esac
}

# leds syntax is -A +<init state> /<new state>
case "$1" in
start) leds -A +"$(colour "$runlevel")";;
stop)  leds -A +"$(colour "$previous")" /"$(colour "$runlevel")";;
*)     echo "led change: $1: command ignored" >&2;;
esac

exit 0