#!/bin/sh
# PC zeitgesteuert starten indem die rtc-Zeit per acpi gestellt wird

# $1 - wakeup time
# $2 - second up to wakeup
# $3 - only a test if set to "test"

# current time
cur_time=`date +%s`

# how many seconds before the next event the system should be booted
boot_time=120
down_time=60

# Zeit beim Runterfahren setzen
if [ -n "$1" ] ; then
	if [ $1 -eq 0 ] ; then 
		# kein timer gesetzt
		wake_time=$(( $cur_time - $boot_time ))
	else
		if [ $2 -lt $(( $boot_time + $down_time )) ] ; then
			# zeit bis zum naechsten timer ist zu kurtz
			exit 2
		fi
		wake_time=$(( $1 - $boot_time ))
	fi

	if [ -e /sys/class/rtc/rtc0/wakealarm ]; then
		if [ "$3" = "test" ];then
			exit 0
		fi
	
		echo 0 > /sys/class/rtc/rtc0/wakealarm || exit 2
		echo $wake_time > /sys/class/rtc/rtc0/wakealarm || exit 2
		echo $wake_time > /sys/class/rtc/rtc0/wakealarm
	elif [ -e /proc/acpi/alarm ]; then
		if [ "$3" = "test" ];then
			if [ "$4" = "onchange" -a "`cat /proc/acpi/alarm`" != "`mydate -d $wake_time "+%Y-%m-%d %H:%M:%S"`" ];then
				exit 1
			fi
			exit 0
		fi
	
		mydate -d $wake_time "+%Y-%m-%d %H:%M:%S" >/proc/acpi/alarm || exit 2
		mydate -d $wake_time "+%Y-%m-%d %H:%M:%S" >/proc/acpi/alarm
	else
		echo "No timer device found" >&2
		exit 2
	fi
fi
exit 0