Introduction

This repository holds a small program for a virtual file system (VFS), which simulates a file system in memory all within a single file.

This project is based on FAT (File Allocation Table) file system principles, albeit very simplified.

Building

Well, you do need CMake, which is pretty standard. Run in bash:

chmod +x build.sh # If you are on Windows, use Git Bash or WSL
./build.sh

Features

• Single directory structure.
• Files can be placed (put), retrieved (get), and deleted.
• Basic listing operation as well as printing the memory usage.
• Some basic error handling as well as a couple of input checks, so you don't create 10TB files by accident.

Usage

After building, run the program:

./vfs

Commands list: [dmake dremove dput dget ddel dls dmap help about]

Upsides and downsides:

• Upsides:

  • Relatively simple.
  • Little abstaction.
  • Single file, no dependencies.
  • Similar to FAT.
  • Directory and FAT are at fixed positions.
  • Able to see the memory usage.
  • External fragmentation is not a problem, due to FAT-like structure.

• Downsides:

  • No subdirectories.
  • Incredibly basic, just bare minimum.
  • Scalability is not considered.
  • Concurrency is not considered.
  • Not suitable for proper OS.
  • Internal fragmentation is a problem, due to fixed-size blocks.
  • File limit (64 files), drive size limit (4KB to 100MB), but can be changed in the code.

License

This project is licensed under the GNU General Public License v3.0. See the LICENSE file for details.