code: def make_bind_mount(source, target, recursive=False, private=False, read_only=False):
      
      flags = libc.MS_BIND
      if recursive:
          flags |= libc.MS_REC
      if private:
          flags |= libc.MS_PRIVATE
      if read_only:
          flags |= libc.MS_RDONLY
      libc.mount(source, target, None, flags, None)
docs: Make a bind mount.
      @param source: the source directory as bytes
      @param target: the target directory as bytes
      @param recursive: whether to also recursively bind mount all mounts below source
      @param private: whether to mark the bind as private, i.e., changes to the existing mounts
          won't propagate and vice-versa (changes to files/dirs will still be visible).