bindfs 1.15.1 Bind mount a directory and alter permission bits
bindfs is a FUSE file system for mounting a directory to another location, similar to
mount --bind. It can be used for:
Making a directory read-only.
Making all executables non-executable.
Sharing a directory with a list of users (or groups).
Modifying permission bits using rules with chmod-like syntax.
Changing the permissions with which files are created.