Customised Virtual File System – (CVFS)

Technology: C programming

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Project Overview

This project is a custom implementation of a Virtual File System (VFS) that simulates the core functionality of the Linux file system. It is built entirely in C, with its own custom shell to interact with the virtual environment. The project provides a practical understanding of system calls, file handling, memory management, and OS internals.

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Key Features

• Custom Shell Interface

  • Provides Linux-like commands for file operations (create, open, read, write, delete, ls, etc.)

• System Call Simulation

  • Implements core Linux file system calls (open, read, write, lseek, close, rm, etc.) using C

• File System Data Structures

  • In-core Inode Table
  • File Table
  • UAREA (user area)
  • User File Descriptor Table

• Platform Independent

  • Allows Linux-style system-level file handling to be used on any operating system

• Database-like Functionality

  • Provides a customised database management layer with structured file handling

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Learning Outcomes

• Deep understanding of Linux File System internals
• Practical knowledge of data structures used in OS (inode, file tables, UAREA)
• Strong grasp of system programming in C
• Hands-on experience with shell design & command interpreters
• Application of low-level logic building for OS-like environments

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Compilation & Execution

To compile the project, use gcc as follows:

gcc -o myexe main.c virtualfs.c -Wall

To run the executable:

$ ./myexe

This will launch the VirtualCFS shell where you can execute commands like create, write, read, stat, and exit.

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🖼 Screenshots

Shell Interface

Write Example

Read Example

Author

Omkar Mahadev Bhargude 📌 LinkedIn