An OCaml implementation of the FUSE protocol versions 7.8 and 7.23
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README.md

profuse

profuse is an OCaml implementation of the FUSE protocol versions 7.8 and 7.23. The 7.8 protocol version is common to UNIX/GNU Linux, FreeBSD, and OS X. Presently, the library only provides the Linux implementation.

Install

You need to add the ocamllabs opam-repository to have all the right dependencies:

opam remote add ocl https://github.com/ocamllabs/opam-repo-dev.git
opam install profuse

Use lofs with docker

Warning: This is very experimental.

First, prepare your local filesystem:

mkdir <mnt-dir>  # for instance ~/fuse-mnt
mkdir <data-dir> # for instance ~/fuse-data

Note: <mnt-dir>/ MUST NOT be a child of <data-dir>/, otherwise bad things will happen. <data-dir>/ will contains files mirrored by <mnt-dir>/, and all reads and writes to the <mnt-dir>/ files will go through the lofs daemon and will be reflected back in <data-dir>/.

To "connect" the two directories using the lofs daemon, run:

cd <data-dir> && ./lofs_main.native <mnt-dir>

You can test the result by opening a new terminal and modifying things in <mnt-dir>: you will see the lofs daemaon spitting out FUSE requests.

We can now start a docker container and mount <mnt-dir> as data volume:

docker run -it -v <mnt-dir>:/home ubuntu bash

If you cd /home into the container, you will see the lofs daemon spitting out FUSE requests.