#!/bin/bash

#
# 1998, Till Christian Siering
#

LD_LIBRARY_PATH="$LD_LIBRARY_PATH:../lib"
export LD_LIBRARY_PATH
PATH="$PATH:."
export PATH

#
# Prints usage.
#
usage() {
    echo ""
    echo "rt_fixcalc -(start|stop)"
    echo ""
    echo "  -start inserts all kernel modules needed for the fixed point calculator example";
    echo "         and starts the simple fixed point calculator shell. To quit the shell";
    echo "         just type something, which can not be interpreted.";
    echo "  -stop  removes all kernel modules needed for the fixed point calculator example.";
    echo ""
}

#
# loads all kernel modules.
#
rt_fixcalc_load() {
	if [ $(id -u) = "0" ]
	then
		insmod rt_fifo_new;
		insmod ../bin/rt_fix.o;
		insmod ./rt_process.o;
		fixcalc;
	else
		echo "You have to be root to load kernel modules.";
	fi
}

#
# removes all kernel modules.
#
rt_fixcalc_unload() {
	rmmod rt_process
	rmmod rt_fix
	rmmod rt_fifo_new;
}

#
# here begins the Program
#
case $1 in
    -start)  rt_fixcalc_load ;;
    -stop)   rt_fixcalc_unload ;;
    *)       usage ;;
esac