Access to a FS from a shell

[vkuznet]

I'm not sure if it is possible but I would like to see an example where we can create any kind of FS but it should be visible on underlying OS under some mount point. For instance, here is a code I came up with:

package main

import (
	"log"
	"os"
	"time"

	"github.com/blang/vfs"
	"github.com/blang/vfs/memfs"
	"github.com/blang/vfs/mountfs"
)

func main() {
	// Create a vfs accessing the filesystem of the underlying OS
	osfs := vfs.OS()

	// Create a fully writable filesystem in memory
	mfs := memfs.Create()

	// Create a vfs supporting mounts
	fs := mountfs.Create(osfs)

	// Mount a memfs inside /memfs
	fs.Mount(mfs, "/memfs")

	f, err := mfs.OpenFile("file.efs", os.O_CREATE|os.O_WRONLY, 0)
	defer f.Close()

	if err == nil {
		log.Println("created /memfs/file.efs")
		_, err := f.Write([]byte("Some content"))
		if err != nil {
			log.Println("unable to write content to file.efs", err)
		}
	} else {
		log.Println("failed to create /memfs/file.efs", err)
	}
	for {
		time.Sleep(10 * time.Second)
	}

}

So, if I compile and run it it serves as a daemon, but I would like to see my /memfs from underlying OS shell. Is it possible?