#!/bin/bash

MODULE_NAME="tempMonitor"
DEVICE_NAME="/dev/temp_monitor"

echo "What would you like to do?"
echo "1. Install"
echo "2. Uninstall"
read -p "Enter option [1 or 2]: " option

case $option in
    1)
        echo "Installing the kernel module..."
        make clean
        make
        sudo rmmod $MODULE_NAME 2>/dev/null
        sudo insmod ${MODULE_NAME}.ko
        MAJOR_NUMBER=$(sudo dmesg | grep "temp_monitor: Device initialized with major number" | tail -1 | awk '{print $NF}')
        if [ -z "$MAJOR_NUMBER" ]; then
            echo "Failed to get major number from dmesg. Aborting."
            exit 1
        fi
        sudo mknod $DEVICE_NAME c $MAJOR_NUMBER 0
        sudo chmod 666 $DEVICE_NAME
        echo "Module installed and device file created successfully."
        ;;
    2)
        echo "Uninstalling the kernel module..."
        sudo rmmod $MODULE_NAME
        sudo rm -f $DEVICE_NAME
        echo "Module and device file removed successfully."
        ;;
    *)
        echo "Invalid option."
        ;;
esac