📂 NextGen Virtual File System (NVFS) 📂

A C-based system programming project that emulates core functionalities of UNIX-like file systems.

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🚀 Features

• Emulation of file system data structures:

  • Inode Table
  • File Table
  • User File Descriptor Table (UAREA)
  • Superblock
  • Disk Inode List Block
  • Data Blocks & Boot Block

• Implementation of system calls:
  open, close, read, write, lseek, stat, chmod, unlink

• Support for UNIX-like commands:
  ls, ls -l, ls -a, rm, cat, cd, chmod, cp, df, find, grep, ln, mkdir, pwd, touch, uname, man, mkfs

• Demonstrates internal working of system calls and commands

• Lightweight learning tool for File System architecture & algorithms

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🛠️ Technology Stack

• Language: C (System Programming)
• Platform: Windows NT / Linux distributions
• Architecture: Intel 32-bit processor
• Interface: Command-Line Interface (CLI)

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📖 Project Overview

NVFS replicates the behavior of UNIX File Systems in a virtual environment, storing and manipulating records in primary storage (RAM).
It serves as a hands-on tool to learn how file systems are structured and how system calls interact with underlying data structures.

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📂 Data Structures

• Inode – Represents files and metadata
• File Table – Tracks open files
• User File Descriptor Table (UAREA) – Maps user processes to files
• Superblock – Contains global FS metadata
• Disk Inode List Block – Manages inode storage
• Data Blocks – Store actual file content

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📊 Project Flow

1. Initialize core data structures
2. Create & manage files/directories
3. Execute file system commands
4. Handle system calls internally
5. Display results on CLI

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📚 References

• Advanced Programming in the UNIX Environment – W. Richard Stevens
• UNIX File System documentation

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💡 Possible Improvements

• GUI-based interface for visualization
• 64-bit platform support
• Extension to persistent storage instead of primary memory

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📌 Usage

# Compile
g++ nvfs.c -o nvfs

# Run
./nvfs