#! /bin/sh
#
# Copyright Matthias Hentges <devel@hentges.net> (c) 2005
# License: GPL (see http://www.gnu.org/licenses/gpl.txt for a copy of the license)
#
# Date: 09-FEB-06
#
# This script checks if a keyboard is present and then runs a propper LM.
# On devices w/o keyboard, a LM from the NO_KBD_LMS variable is selected.
#
# If more than one usable login-manager is found, the first one is used.
#
# Users can force their favorite login-manager to be selected via symlinking
# a LM from /etc/X11/login-managers to /etc/X11/login-managers/default.
#

LM_PATH="/etc/X11/login-managers"

# A list of login-manager which display an OSD keyboard
NO_KBD_LMS="gpe-dm"

#
# * * * No user-variables behind this point * * *
#

run_wm() {
	if test -z "$1"
	then
		echo -e "\t* No valid login-managers found"
		exit 0
	fi
	
	echo "$1" > /tmp/_running_lm
	echo -e "\t* Starting `basename "$1"`\n--\n"
	
	"$1" start
	
	exit 0
}

get_valid_lms() {
	if test "$HAS_KBD" = no
	then
		for lm in $NO_KBD_LMS
		do	
			if echo "$LM_FILES" | grep -iq "$lm"
			then
				test -x "$LM_PATH/$lm" && VALID_LMS="$VALID_LMS $lm" || echo -e "\t* Discarding [$lm]: Not executable"
			fi
		done
	else
		for lm in $LM_FILES
		do
			test -x "$LM_PATH/$lm" && VALID_LMS="$VALID_LMS $lm" || echo -e "\t* Discarding [$lm]: Not executable"
		done	
	fi	
	SELECTED_LM="$LM_PATH/`echo "$VALID_LMS" | awk '{print $1}'`"
}

do_start(){
#	DISPLAY_MODE="$(fbset | grep mode | sed -n "s/.*\"\(.*\)\-.*/\1/p")"
	HARDWARE_MODEL="`cat /proc/cpuinfo | sed -n "s/^Hardware.*\:\ \(.*\)/\1/p"`"
	LM_FILES="`ls -1 "$LM_PATH" | grep -v default`"

	echo "$HARDWARE_MODEL" | grep -iq "SHARP" && HAS_KBD=yes || HAS_KBD="no"

	echo "Launching login-manager"
	echo -e "\t* Model has keyboard: $HAS_KBD"

	# The user is always right
	if test -x "$LM_PATH/default" >/dev/null 2>&1
	then
		echo "\t* Using default manager"
		run_wm "$LM_PATH/default"
	fi

	get_valid_lms

	echo -e "\t* Valid modes:$VALID_LMS"
	
	run_wm "$SELECTED_LM"
}

do_stop(){
	echo "Stopping login-manager..."
	`cat /tmp/_running_lm` stop
	
	for x in Xfbdev Xomap Xorg Xepson
	do
        	killall "$x" >/dev/null 2>&1
	done
}

case "$1" in
	start)		do_start;;
	stop)		do_stop;;
	restart)	do_stop
			do_start;;		
	*)		echo "Usage: `basename $0` [start|stop|restart]"
			exit 0;;
esac