This repository contains codes, outputs and documentations for CE424 (Operating Systems) course project lectured in Spring 2020.

This project is divided into three separate phases. Each phase description is provided in this section.

In this phase, a kernel module is created, which can compute Fibonacci series up to a given input number. It also contains an API where user can enter the number. This API uses a device file to communicate with kernel module.

In this phase, in client side user enters a process ID and then API prints out some details about that process in different periods of time.

In this phase we implemented BLP logic using kernel modules. BLP is a mandatory access control method which defines some security labels to control read/write access of each file. Also access history of each file is saved in another file.

• Open terminal and write following command:

  git clone https://github.com/alirezadaghigh99/Operating-Systems.git
  

  Then go to one of the phases and then run these following commands:

  make
  

  By executing this command, you will see some new files added to project. Then:

  sudo insmod X.ko
  

  Where X is name of ko file. Then for monitoring the kernel messages use this command:

  sudo dmesg
  

  After that we have to give some permissions to this kernel module by following command

  sudo chmod 666 /dev/kernel-module-name
  
  

  After all we have to run client code by going to client folder and running this command:

  gcc -o api api.c
  ./api
  

  Again for monitoring kernel messages:

  sudo dmesg
  

  In the end, for removing this kernel module run this command

  sudo rmmod X.ko
  

  Where X is name of ko kernel module.

• Nima Jamali

  • GitHub: @nimajam41
  • LinkedIn: Nima Jamali

• Alireza Daghigh

  • GitHub: @alirezadaghigh99

This project is available thanks to all contributors.