#!/bin/sh

POWERSAVED_SUSPEND2DISK="dbus-send --system --dest=com.novell.powersave \
                         --print-reply /com/novell/powersave \
                         com.novell.powersave.action.SuspendToDisk"

unsupported() {
	echo org.freedesktop.Hal.Device.SystemPowerManagement.NotSupported >&2
	echo No hibernate script found >&2
	exit 1
}

#SuSE and ALTLinux only support powersave
if [ -f /etc/altlinux-release ] || [ -f "/etc/SuSE-release" ] ; then
	if [ -x /usr/bin/powersave ] ; then
	        $POWERSAVED_SUSPEND2DISK
		RET=$?
	else
		unsupported
	fi

#Mandriva support suspend-scripts 
elif [ -f /etc/mandriva-release ] ; then 
    if [ -x /usr/sbin/pmsuspend ] ; then 
	/usr/sbin/pmsuspend disk 
	RET=$? 
    else 
	unsupported 
    fi 

#RedHat/Fedora only support pm-utils
elif [ -f /etc/redhat-release ] || [ -f /etc/fedora-release ] ; then
	if [ -x /usr/sbin/pm-hibernate ] ; then
		/usr/sbin/pm-hibernate
		RET=$?
	else
		unsupported
	fi

#Other distros just need to have *any* tools installed
else
	if [ -x "/sbin/s2disk" ] ; then
		# uswsusp tools installed
		/sbin/s2disk
		RET=$?
	elif [ -x "/usr/sbin/pmi" ] ; then
		/usr/sbin/pmi action hibernate force
		RET=$?
	elif [ -x "/usr/bin/powersave" ] ; then
	        $POWERSAVED_SUSPEND2DISK
		RET=$?
	elif [ -x "/usr/sbin/pm-hibernate" ] ; then
		/usr/sbin/pm-hibernate
		RET=$?
	elif [ -x "/usr/sbin/hibernate" ] ; then
		# Suspend2 tools installed
		/usr/sbin/hibernate --force
		RET=$?
	elif [ -x "/etc/acpi/hibernate.sh" ] ; then
		# acpi-support installed
		/etc/acpi/hibernate.sh force
		RET=$?
	elif [ -w "/sys/power/state" ] ; then
		# Use the raw kernel sysfs interface
		echo "disk" > /sys/power/state
		RET=$?
	else
		unsupported
	fi
fi

#Refresh devices as a resume can do funny things
for type in button battery ac_adapter
do
	devices=`hal-find-by-capability --capability $type`
	for device in $devices
	do
		dbus-send --system --print-reply --dest=org.freedesktop.Hal \
			  $device org.freedesktop.Hal.Device.Rescan
	done
done

exit $RET