#! /bin/bash
# Copyright (c) 2002 SuSE Linux AG, Nuernberg, Germany.
# All rights reserved.
#
# Authors: Christian Zoz <zoz@suse.de>
#          Timo Hoenig <thoenig@suse.de>
#
# /etc/init.d/acpid
#   and its symbolic link
# /usr/sbin/rcacpid
#
# LSB compliant service control script; see http://www.linuxbase.org/spec/
# 
### BEGIN INIT INFO
# Provides:                   acpid
# Required-Start:             $local_fs
# Required-Stop:
# Default-Start:              2 3 5
# Default-Stop:               0 1 6
# Short-Description: Listen and dispatch ACPI events from the kernel
# Description:       acpid reads events from /proc/acpi/event and dispatches
#	them (by SuSE default) to other "users" like powersaved, HAL and IAL.
#	Actions for those events are (by SUSE default) configured in the
#	powersaved configuration.
#	Additionally this start script loads all needed modules.

### END INIT INFO

# Check for missing binaries (stale symlinks should not happen)
ACPID_BIN=/sbin/acpid
test -x $ACPID_BIN || exit 5

# Shell functions sourced from /etc/rc.status:
#      rc_check         check and set local and overall rc status
#      rc_status        check and set local and overall rc status
#      rc_status -v     ditto but be verbose in local rc status
#      rc_status -v -r  ditto and clear the local rc status
#      rc_status -s     display "skipped" and exit with status 3
#      rc_status -u     display "unused" and exit with status 3
#      rc_failed        set local and overall rc status to failed
#      rc_failed <num>  set local and overall rc status to <num>
#      rc_reset         clear local rc status (overall remains)
#      rc_exit          exit appropriate to overall rc status
#      rc_active	checks whether a service is activated by symlinks
#      rc_splash arg    sets the boot splash screen to arg (if active)
. /etc/rc.status

# Reset status of this service
rc_reset

# Return values acc. to LSB for all commands but status:
# 0	  - success
# 1       - generic or unspecified error
# 2       - invalid or excess argument(s)
# 3       - unimplemented feature (e.g. "reload")
# 4       - user had insufficient privileges
# 5       - program is not installed
# 6       - program is not configured
# 7       - program is not running
# 8--199  - reserved (8--99 LSB, 100--149 distrib, 150--199 appl)
# 
# Note that starting an already running service, stopping
# or restarting a not-running service as well as the restart
# with force-reload (in case signaling is not supported) are
# considered a success.

ACPI_MODULES=""
DEFAULT_ACPI_MODULES="ac battery button fan processor thermal"
ACPI_LAPTOP_MODULES_PROBE="asus_acpi ibm_acpi toshiba_acpi sony_acpi pcc_acpi dock bay"
ACPI_LAPTOP_MODULES_FILE="/var/lib/acpi/laptop_modules"

ARCH=`uname -i`
case $ARCH in
	ia64)	DEFAULT_ACPI_MODULES="button fan processor thermal"
		ACPI_LAPTOP_MODULES_PROBE=""
		# avoid even occassional probing of laptop modules!
		ACPI_LAPTOP_MODULES_USER="NONE"
		;;
esac

[ -f /etc/sysconfig/powersave/common ] && . /etc/sysconfig/powersave/common
[ -f /etc/sysconfig/acpi ] && . /etc/sysconfig/acpi 
[ -f /etc/sysconfig/powersave/cpufreq ] && . /etc/sysconfig/powersave/cpufreq

case "$1" in
	start)
		if [ ! -d /proc/acpi ] ; then
			echo -n "acpid: no ACPI support in kernel"
			rc_status -s
			rc_exit
		fi

		echo -n "acpid: loading ACPI modules ( "
		if [ "$ACPI_MODULES" != "NONE" ]; then
		    # load ACPI modules
		    for m in ${ACPI_MODULES:-$DEFAULT_ACPI_MODULES}; do
			grep -wq $m /proc/modules || { modprobe -s $m && echo -n "$m " || rc_status; }
		    done
		fi
		echo -n ") "
		rc_status -v

		if [ -n "$ACPI_LAPTOP_MODULES_USER" ]; then
		    if [ "$ACPI_LAPTOP_MODULES_USER" != "NONE" ]; then
			echo -n "acpid: loading ACPI laptop modules ( "
			# Load modules defined by user
			for m in ${ACPI_LAPTOP_MODULES_USER}; do
			    grep -wq $m /proc/modules || { modprobe -s $m && echo -n "$m " || rc_status; }
			done
			echo -n ") "
			rc_status -v
		    fi
		else
		    if [ /boot/vmlinuz -ot "$ACPI_LAPTOP_MODULES_FILE" ]; then
			echo -n "acpid: loading ACPI laptop modules ( "
    			# Load modules defined by system probe
	    		while read m; do
		    	    grep -wq $m /proc/modules || { modprobe -s $m && echo -n "$m " || rc_status; }
    			done < $ACPI_LAPTOP_MODULES_FILE
			echo -n ") "
			rc_status -v
		    else
	    		# First run, or kernel has been updated. We have to probe which
			# modules load successfully.  For this, we do respect
		    	# LOAD_UNSUPPORTED_MODULES_AUTOMATICALLY.

		    	echo "acpid: probing laptop ACPI modules "
    			touch "$ACPI_LAPTOP_MODULES_FILE"
    			for m in $ACPI_LAPTOP_MODULES_PROBE; do
    			    if modprobe $MODPROBE_OPTS -s $m; then
				# pcc_acpi and sony_acpi can always be loaded. 
				# remove them if the system does not support them.
				case $m in
				    sony_acpi)
					if [ ! -r /proc/acpi/sony/brightness ] ; then
					    grep -wq $m /proc/modules && rmmod sony_acpi;
					    continue
					fi ;;
				    pcc_acpi)
					if [ ! -r /proc/acpi/panasonic -a ! -r /proc/acpi/pcc ] ; then
					    grep -wq $m /proc/modules && rmmod pcc_acpi;
					    continue
					fi ;;
				    asus_acpi)
					if [ ! -r /proc/acpi/asus ] ; then
					    grep -wq $m /proc/modules && rmmod asus_acpi;
					    continue
					fi ;;
				esac
				echo $m >> $ACPI_LAPTOP_MODULES_FILE
			    fi
    			done 
			echo -n "acpid: added " 
		    	while read m; do
				echo  -n "$m "
    			done < $ACPI_LAPTOP_MODULES_FILE
		
			echo -n "to $ACPI_LAPTOP_MODULES_FILE"
	    		rc_status -v;
		    fi
		fi
		
		echo -n "Starting acpid "
		startproc $ACPID_BIN
		rc_status -v
		;;
	stop)
		echo -n "Shutting down acpid "
		killproc -TERM $ACPID_BIN
		rc_status -v
		;;
	try-restart)
	        $0 status
		if test $? = 0; then
			$0 restart
		else
			rc_reset        # Not running is not a failure.
		fi
		rc_status
		;;
	restart)
		$0 stop
		$0 start
		rc_status
		;;
	force-reload|reload)
		echo -n "Reload service acpid "
		killproc -HUP $ACPID_BIN
		rc_status -v
		;;
	status)
		echo -n "Checking for service acpid "
		PID=`checkproc -v $ACPID_BIN`
		if rc_status ; then
			case `cat /proc/$PID/cmdline` in *events.ignore) rc_failed 3; esac
		fi
		rc_status -v
		;;
	probe)
		test $ACPID_CONFIG -nt /var/run/acpid.pid && echo restart
		;;
	*)
		echo "Usage: $0" \
		     "{start|stop|status|try-restart|restart|force-reload|reload|probe}"
		exit 1
		;;
esac
rc_exit