CVFS — Customised Virtual File System

A custom virtual file system implementation that simulates core OS-level file management in user space.

Features

• Create, read, write, and delete virtual files
• Directory tree navigation (mkdir, cd, ls, rmdir)
• Inode-based allocation with a FAT-style block map
• Persistence: serialises the entire VFS state to a single binary file

How it works

The VFS is backed by a flat binary store divided into fixed-size blocks. An inode table tracks file metadata (name, size, permissions, block pointers). All operations go through a thin system-call layer that mirrors POSIX semantics without touching the real filesystem.

Tech

• Language: C
• Build: make
• No external dependencies

Run

make
./cvfs          # interactive shell
cvfs> mkdir docs
cvfs> touch docs/notes.txt
cvfs> write docs/notes.txt "hello world"
cvfs> ls docs