Is this possible ? inherit group permissions

[cs]

Hi,

For a directory, e.g. foo/, if I chmod 775 foo/, is it possible for 
newly created files and directories under foo/ to automagically inherit 
the group permissions of foo ?

e.g.
touch foo/test would be rw-rw-r--
mkdir foo/sub would be rwxrwxr-x

I am looking for a non umask solution.

I seem to remember in debian, I was able to make the group permissions 
of the parent directory special for this magic to occur.

I wonder if there is something similar in FBSD.

Thank you.


-cs