https://github.com/mohitmishra786/exploring-os

This repository is a journey through Operating System concepts, with practical implementations in C. Each day focuses on a specific topic, providing theoretical understanding and hands-on coding experience.
https://github.com/mohitmishra786/exploring-os

c-programming c-programming-language cpu kernel-driver kernel-module linux linux-kernel operating-system operating-systems os programming project-repository

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This repository is a journey through Operating System concepts, with practical implementations in C. Each day focuses on a specific topic, providing theoretical understanding and hands-on coding experience.

• Host: GitHub
• URL: https://github.com/mohitmishra786/exploring-os
• Owner: mohitmishra786
• License: mit
• Created: 2024-11-23T12:05:44.000Z (6 months ago)
• Default Branch: main
• Last Pushed: 2025-03-04T16:53:28.000Z (3 months ago)
• Last Synced: 2025-04-13T07:46:41.479Z (about 1 month ago)
• Topics: c-programming, c-programming-language, cpu, kernel-driver, kernel-module, linux, linux-kernel, operating-system, operating-systems, os, programming, project-repository
• Language: HTML
• Homepage:
• Size: 25.1 MB
• Stars: 246
• Watchers: 8
• Forks: 41
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# Exploring Operating Systems: 69 Days of Deep Dive Implementation in C

## Overview

This repository is a journey through Operating System concepts, with practical implementations in C. Each day focuses on a specific topic, providing theoretical understanding and hands-on coding experience.

## Repository Structure

- Each topic will have its own directory

- Includes source code, explanations, and implementation details

- Progressive learning path from basic to advanced OS concepts

## 69 Days Exploration Roadmap

| Day | Topic | Concept Category | Difficulty Level | Implementation Focus |

|-----|-------|------------------|------------------|----------------------|

| 1   | Process Concept | Processes | Easy | Process Definition |

| 2   | Process States and Transitions | Processes | Medium | State Diagram Implementation |

| 3   | Process Creation Mechanisms | Processes | Medium | Fork(), Exec() Syscalls |

| 4   | Process Scheduling Basics | Scheduling | Medium | FCFS Algorithm |

| 5   | Scheduling Algorithms | Scheduling | Hard | SJF, Priority, Round Robin |

| 6   | Context Switching | Processes | Hard | Implementation Details |

| 7   | Thread Concept | Threads | Easy | Thread Basic Understanding |

| 8   | Thread Creation and Management | Threads | Medium | POSIX Threads |

| 9   | Thread vs Process Comparison | Threads | Medium | Comparative Analysis |

| 10  | Multithreading Models | Threads | Hard | User vs Kernel Threads |

| 11  | Concurrency Fundamentals | Synchronization | Medium | Race Conditions |

| 12  | Mutex and Semaphores | Synchronization | Hard | Implementation |

| 13  | Deadlock Concepts | Synchronization | Hard | Prevention Strategies |

| 14  | Deadlock Detection Algorithms | Synchronization | Hard | Banker's Algorithm |

| 15  | Memory Management Overview | Memory | Easy | Memory Hierarchy |

| 16  | Logical vs Physical Address | Memory | Medium | Address Translation |

| 17  | Contiguous Memory Allocation | Memory | Medium | Allocation Strategies |

| 18  | Paging Mechanism | Memory | Hard | Page Table Implementation |

| 19  | Page Replacement Algorithms | Memory | Hard | FIFO, LRU, Optimal |

| 20  | Segmentation | Memory | Medium | Segment Table |

| 21  | Virtual Memory Concepts | Memory | Hard | Demand Paging |

| 22  | Memory Allocation Internals (malloc, free) | Memory Management | Hard | Custom Memory Allocator |

| 23  | Dynamic Memory Management Techniques | Memory Management | Hard | Memory Pool Strategies |

| 24  | File System Basics | File Systems | Easy | File Concept |

| 25  | File System Structure | File Systems | Medium | Directory Structures |

| 26  | File Allocation Methods | File Systems | Medium | Contiguous, Linked |

| 27  | Free Space Management | File Systems | Hard | Bit Vector, Linked List |

| 28  | File Protection Mechanisms | File Systems | Medium | Access Control |

| 29  | I/O System Management | I/O Systems | Medium | I/O Devices |

| 30  | Disk Scheduling Algorithms | I/O Systems | Hard | SCAN, C-SCAN |

| 31  | Interrupt Handling | Low-Level | Hard | Interrupt Vectors |

| 32  | Advanced System Call Implementation | Low-Level Programming | Hard | Syscall Wrapper Design |

| 33  | Advanced System Call Tracing | Low-Level | Hard | Syscall Interception |

| 34  | Kernel Module Development | Low-Level | Hard | Loadable Kernel Modules |

| 35  | Inter-Process Communication | IPC | Hard | Pipes, Message Queues |

| 36  | Shared Memory Advanced | IPC | Hard | Low-Level Shared Memory |

| 37  | Socket Programming Deep Dive | Networking | Hard | Raw Socket Implementation |

| 38  | CPU Scheduling Advanced | Scheduling | Hard | Multi-Level Queues |

| 39  | Real-Time Operating Systems Internals | Specialized | Hard | RTOS Kernel Design |

| 40  | Linux Kernel Memory Management | Kernel | Hard | Slab Allocator |

| 41  | Process Synchronization Advanced | Synchronization | Hard | Peterson's Algorithm |

| 42  | Resource Allocation Graph Theory | Synchronization | Hard | Deadlock Representation |

| 43  | Memory Fragmentation Techniques | Memory | Medium | Advanced Fragmentation |

| 44  | Cache Management Internals | Memory | Hard | Cache Coherence |

| 45  | File System Journaling | File Systems | Hard | Transaction Mechanisms |

| 46  | Device Driver Development | Low-Level | Hard | Character Device Drivers |

| 47  | Security Mechanism Implementation | Security | Hard | Access Control Kernel |

| 48  | Process Scheduling Simulator | Scheduling | Hard | Comprehensive Simulator |

| 49  | Network File Systems Internals | File Systems | Hard | Distributed FS Design |

| 50  | Error Handling Kernel Mechanisms | Low-Level | Hard | Exception Management |

| 51  | Virtual Memory Hypervisor | Advanced | Hard | Virtualization Techniques |

| 52  | Distributed OS Algorithms | Advanced | Hard | Consensus Protocols |

| 53  | Embedded OS Kernel Design | Specialized | Hard | Minimal Kernel |

| 54  | Microkernel Advanced Design | Architecture | Hard | Message Passing |

| 55  | OS Performance Profiling | Advanced | Hard | Kernel Tracing |

| 56  | Parallel Processing Primitives | Advanced | Hard | Low-Level Parallelism |

| 57  | Fault Tolerance Mechanisms | Advanced | Hard | Recovery Techniques |

| 58  | Advanced Load Balancing | Advanced | Hard | Scheduling Strategies |

| 59  | Containerization Internals | Advanced | Hard | Namespace Implementation |

| 60  | Kernel Synchronization Primitives | Advanced | Hard | Spinlocks, RCU |

| 61  | Security Vulnerability Analysis | Security | Hard | Buffer Overflow |

| 62  | Cryptographic Kernel Mechanisms | Security | Hard | Encryption Primitives |

| 63  | Malware Detection Techniques | Security | Hard | Kernel-Level Detection |

| 64  | OS Forensics Deep Dive | Security | Hard | Kernel Trace Analysis |

| 65  | Memory Allocator Design | Memory | Hard | Custom Heap Implementation |

| 66  | Advanced IPC Mechanisms | IPC | Hard | Advanced Signaling |

| 67  | Kernel Debugging Techniques | Low-Level | Hard | Kernel Crash Analysis |

| 68  | Advanced Syscall Handling | Low-Level | Hard | Syscall Optimization |

| 69  | Complete OS Kernel Prototype | Project | Hard | Minimal Bootable Kernel |

---

## Final Projects

Each project spans 3 days, allowing for in-depth exploration and implementation.

1. **Build a Minimal Bootable Kernel**  

   - Create a simple kernel that boots and prints a message to the screen.

2. **Implement a Custom Memory Allocator**  

   - Design and implement a memory allocator with malloc, free, and realloc functionality.

3. **Develop a File System Simulator**  

   - Simulate a basic file system with directory structures, file allocation, and free space management.

4. **Create a Process Scheduling Simulator**  

   - Implement a simulator for various scheduling algorithms like FCFS, SJF, and Round Robin.

5. **Design a Virtual Memory Manager**  

   - Build a virtual memory manager with paging and page replacement algorithms.

6. **Develop a Loadable Kernel Module**  

   - Write a kernel module that interacts with the Linux kernel and performs a specific task.

7. **Implement a Network File System**  

   - Create a basic distributed file system with client-server communication.

8. **Build a Real-Time Operating System Kernel**  

   - Design a minimal RTOS kernel with task scheduling and synchronization primitives.

  

## Contributing

- Detailed code implementations welcome

- Follow coding standards

- Include comprehensive documentation

## Learning Objectives

- Deep understanding of Operating System principles

- Practical C programming skills

- Real-world problem-solving techniques

## Prerequisites

- C Programming

- Deep Computer Science Knowledge

- Linux/Unix Kernel Understanding Recommended

## License

[LICENSE](LICENSE)

## Disclaimer

This is an advanced educational resource for understanding Operating Systems through in-depth implementation.