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🎓 Operating Systems Lab Assignments

This repository contains my solutions to a series of lab assignments for an Operating Systems course. The labs cover fundamental concepts of process and memory management, inter-process communication (IPC), and file systems, providing hands-on experience with low-level system programming.

📋 Topics Covered

  • LA1: Multi-process applications (fork, wait, exec) — Process creation and management.
  • LA2: IPC using signals — Inter-process communication with signals.
  • LA3: Scheduling Algo Simulation — Analyze efficiency of CPU scheduling algorithms.
  • LA4: IPC using pipes and dup — Implement IPC using pipes & file descriptor duplication.
  • LA5: IPC using shared memory — Use shared memory for fast and efficient IPC.
  • LA6: IPC with shared memory + semaphores — Combine SM with semaphores for thread-safe synchronization.
  • LA7: Multi-threading with pthreads — Develop multi-threaded program using the pthread
  • LA8: Deadlock in multi-threaded apps — Handle deadlock conditions in concurrent programs.
  • LA9: Demand paging (no replacement) — Simulate a demand paging system without a page replacement algorithm.
  • LA10: Demand paging (with replacement) — Extend the simulation to include a page replacement algorithm.
  • LA11: File system interface — Work with the user-level interface of a file system.

🛠️ Languages & Tools

This project primarily uses the C/C++ programming languages and relies heavily on a UNIX/Linux environment. Key system calls and libraries used include:

  • Process Management: fork(), exec(), wait()
  • IPC: pipe(), dup(), shmget(), shmat(), semget(), semop(), signal()
  • Threading: pthread_create(), pthread_join()

🚀 Clone Instructions

To get a copy of the repository, follow these steps.

  1. Clone the repository: 
    git clone [https://github.com/your-username/your-repo-name.git](https://github.com/your-username/your-repo-name.git)
  2. Navigate to the project directory: 
    cd your-repo-name
  3. Explore the lab directories: Each lab assignment is contained within its own folder (e.g., LA1). 
    ls
  4. To compile and run a specific assignment: 
    # Example for LA1
cd LA1
gcc -o gendep gendep.c
./gendep
    Note: Some assignments, like those involving threads, will require linking the -pthread library during compilation.