#!/bin/bash
#
# Init file for the TrouSerS TCG Core Services daemon
#
# chkconfig: - 90 10
# description: TrouSerS server daemon
#
# processname: tcsd
# config: /etc/tcsd.conf
# pidfile: /var/run/tcsd.pid

# source function library
. /etc/rc.d/init.d/functions

# pull in sysconfig settings
[ -f /etc/sysconfig/tcsd ] && . /etc/sysconfig/tcsd

RETVAL=0
prog="tcsd"

# Some variables to make the below more readable
TCSD=/usr/sbin/tcsd
PID_FILE=/var/run/tcsd.pid
MODPROBE=/sbin/modprobe
LSMOD=/sbin/lsmod
GREP=/bin/grep
PWD=/bin/pwd
MOD_DIR=/lib/modules/$(uname -r)/kernel/drivers/char/tpm
START_OPT=" start"

load_drivers()
{
	CUR_DIR=`$PWD`
	cd $MOD_DIR

	# Must load tpm_bios.ko first
	$MODPROBE tpm_bios >/dev/null 2>&1
	RETVAL=$?
	if [ $RETVAL -ne 0 ]; then
		failure "Load tpm_bios"
		echo
		cd $CUR_DIR
		return $RETVAL
	fi

	# Must load tpm.ko second
	$MODPROBE tpm >/dev/null 2>&1
	RETVAL=$?
	if [ $RETVAL -ne 0 ]; then
		failure "Load tpm"
		echo
		cd $CUR_DIR
		return $RETVAL
	fi

	# Attempt to load remaining tpm_*.ko
	# But do NOT return error if they fail
	for d in `echo tpm_*`; do
		if [ "$d" != "tpm_bios.ko" ]
		then
			m=${d%".ko"}
			$MODPROBE $m >/dev/null 2>&1
		fi
	done

	cd $CUR_DIR
	success "Load tpm"
	echo
	return $RETVAL
}

check_drivers()
{
	$LSMOD | $GREP tpm_ >/dev/null 2>&1
	RETVAL=$?
	return $RETVAL
}

start()
{
	check_drivers
	RETVAL=$?
	if [ $RETVAL -ne 0 ]; then
		load_drivers
		RETVAL=$?
	fi
	if [ $RETVAL -ne 0 ]; then
		failure $"Loading drivers"
	fi
	echo -n $"Starting $prog: "
	$TCSD $START_OPT && success
	echo
	touch /var/lock/subsys/tcsd && success
	RETVAL=$?
	echo
	return $RETVAL
}

stop()
{
	echo -n $"Stopping $prog: "
	if [ -n "`pidfileofproc $TCSD`" ] ; then
	    killproc $TCSD -HUP
	else
	    failure $"Stopping $prog"
	fi
	RETVAL=$?
	[ "$RETVAL" = 0 ] && rm -f /var/lock/subsys/tcsd
	echo
}

case "$1" in
	start)
		start
		;;
	stop)
		stop
		;;
	restart)
		stop
		start
		;;
	reload)
		restart
		;;
	condrestart)
		if [ -f /var/lock/subsys/tcsd ] ; then
			restart
		fi
		;;
	status)
		status $TCSD
		RETVAL=$?
		;;
	*)
		echo $"Usage: $0 {start|stop|restart|reload|condrestart|status}"
		RETVAL=1
esac
exit $RETVAL