On Thu, 7 Jun 2007, Jeremy C. Reed wrote:

> What man page(s) discuss that when a file is created it inherits the group 
> ID of its directory (instead of the gid of the creating process)?

I answer that myself. It is clearly documented in open(2) which is linked 
from chmod(2).

Since it is not documented in same place, I assume disabling it is not 
possible.

> Linux doesn't do that by default and calls it "BSD semantics". Linux can 
> enable that with S_ISGID bit.
> 
> Can it be disabled on a BSD system? In other words on NetBSD, how to make 
> it so new files are automatically created with the group of creating 
> process (instead of the group of the directory)? I am just curious and I 
> don't need this.

  Jeremy C. Reed