A minimal in-memory File System written in C++17.

The following FUSE operations are currently implemented:

• getattr
• readdir
• mkdir
• rename
• rmdir
• open
• read
• release
• mknod
• unlink
• write

With the above FUSE operations, you can use all the basic commands (ls, cat, touch, mkdir, cd, ...). You can also mostly edit files with NeoVim, but due to some incomplete operations, it will sometimes crash!

makefile
CMakeLists.txt
include
├── clifs_tree.h
├── file_desc.h
├── params.h
└── state.h
README.md
src
├── clifs_tree.cpp
├── file_desc.cpp
└── main.cpp

clifs_tree: This is a tree containing the information of the directories and the files. This is where a lot of the functionality is implemented, from making new files and directories as well as deleting them, to storing their basic metadata (permissions, owner, size, links).

file_desc: This data structure will keep track of what files are currently open. It will assign each open file an id, which fuse will use to write, read, ...

main: This is where the FUSE operations are implemented. Inside the main function, fuse_main is executed, which mounts the file system.

First generate the binary: make build

Then create a root directory which we will later mount to this FS: mkdir mount_point

Now mount that directory: ./build/clifs mount_point

If you now run ls, you should see the mount_point directory, cd into it. Now any commands you use (i.e. touch) will use the CliFS implementation rather than your real disk.

When you are finished, make sure to unmount the directory fusermount -u mount_point. After doing this, if you cd into mount_point, you will notice that anything you created with CliFS is no longer there.

• Save file/dir creation time
• Unit testing
• Add better error handling!
• Persist files