#!/bin/bash

#Copyright (c) 2010 Lucas Nascimento Ferreira
#
#Permission is hereby granted, free of charge, to any person obtaining a copy
#of this software and associated documentation files (the "Software"), to deal
#in the Software without restriction, including without limitation the rights
#to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
#copies of the Software, and to permit persons to whom the Software is
#furnished to do so, subject to the following conditions:
#
#The above copyright notice and this permission notice shall be included in
#all copies or substantial portions of the Software.
#
#THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
#IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
#FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
#AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
#LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
#OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
#THE SOFTWARE.
# Takes the "seat name" as parameter $1

SEAT_NAME=$1
SEAT_NUMBER=${SEAT_NAME#seat}
CK_SESSIONS_DIR="/etc/ConsoleKit/sessions.d/"
CK_LIST_SESSION="/usr/bin/ck-list-sessions"
CK_SEAT_TOOL="/usr/sbin/ck-seat-tool"
XORG_CONF_USBSEAT="/etc/X11/xorg.conf.usbseat"
XORG_CONF_TMP="/tmp/xorg.conf.tmp"

echo "Udev Action: $ACTION" &>> /var/log/usbseat.log

if [ "$ACTION" == "remove" ]; then

    echo "Removing $SEAT_NAME." &>> /var/log/usbseat.log

    # Remove the lock, so now we can use this seat_id for start a new seat.
    rm -f /tmp/$SEAT_NAME.lock

#    The followling lines are commented because ConsoleKit daemon crashes if
#    the usbseats are connected and disconected several times.
#
#    SESSION_ID=`$CK_LIST_SESSION -a | grep -B3 usbseat$SEAT_NUMBER | head -n1`
#    $CK_SEAT_TOOL -d --session-id ${SESSION_ID%\:} &>> /var/log/usbseat.log

    echo "$SESSION_ID removed." &>> /var/log/usbseat.log
else

    if [ -e /tmp/$SEAT_NAME.lock ]; then

        echo "${SEAT_NAME} already exists." &>> /var/log/usbseat.log
        exit 0
    fi

    # Check if we have a usefull seat.
    if [[ -e /dev/usbseat/$SEAT_NAME/keyboard && -e /dev/usbseat/$SEAT_NAME/mouse && -e /dev/usbseat/$SEAT_NAME/display ]]; then

        echo "Starting ${SEAT_NAME}" &>> /var/log/usbseat.log

        # Every time a device is connected to a seat, this script will be
        # called, so create a lock file for start the seat only when is
        # necessary
        touch /tmp/$SEAT_NAME.lock

        # We have a newly complete seat. Start it.
        sed "s/%ID_SEAT%/$SEAT_NAME/g" < $XORG_CONF_USBSEAT > $XORG_CONF_TMP

        $CK_SEAT_TOOL -a --session-type usbseat --display-type usbseat --seat-id usbseat$SEAT_NUMBER &>> /var/log/usbseat.log
    fi
fi