📂 FAT32 Reader

A lightweight, work-in-progress FAT32 reader written in C. This tool reads a raw disk image or block device on UNIX-like systems and inspects its partition layout and FAT32 filesystem metadata.

⚠️ This is a side project I work on occasionally — it's in the early stages, and the codebase is kept intentionally simple (not yet scalable or fully modular).

🚀 What It Does

• Opens a disk or image file (/dev/sdX, .img, etc.)

• Parses and prints:

  • Master Boot Record (MBR)
  • FAT32 Boot Sector info
  • Number of clusters, filesystem type, etc.

• Verifies if the volume is FAT32

📁 Project Structure

fat32-reader/
├── build/          # Disk image files and build files
├── src/
│   ├── proc.c      # All core procedures (open_disk, isFat32, read_bootCode, ...)
│   └── header.h    # Header declarations
├── main.c          # Entry point: uses the functions to parse the disk
├── Makefile        # Simple build script

All logic is centralized in proc.c for now — no abstraction or modular design yet. This might evolve if I dedicate more time to it in the future.

🧪 Testing

Currently, there are no automated tests. I plan to add some later when time allows. In the meantime, basic validation is done by manually running the program on known-good disk images.

🛠 Build and Run

🛠 Build

make

▶️ Run

Runs automatically, or:

./build/main

⚙️ Features (Planned / Potential)

• Better error handling
• Unit tests for parsing routines
• Extensible support for FAT16/FAT12
• Recursive directory listing

❗ Note

This is not production-grade and should be used carefully — especially when pointing it to real block devices (/dev/sdX). Always prefer running it on image files unless you know what you’re doing.

📜 License

MIT License — use, fork, modify freely. No warranties.