Inheriting group ownership under Red Hat Linux?

[alan]

On Wed, 23 Jun 2004, Carl Riches wrote:

> 
> We are running into a problem that did not occur under our Unix systems:
> inheriting group ownership on files.  The problem is that a file created
> in a directory does not inherit the group ownership of the directory.
> Rather it gets the group ownership of the user that created the file.
> 
> Under our other Unix systems, a file would get the group ownership of the
> directory where it was created.
> 
> For example, let's say that there is directory:
> 
>     drwxrwxr-x    2 root     fugroup        4096 Jun  8 11:45 fubar/
> 
> Let's say that user "riches" creates a file in directory fubar/.  The
> primary group for user "riches" is "staff", but that user also belongs
> to "fugroup" and can write to the fubar/ directory.  The file created in
> that directory is owned by "riches:staff", not "riches:fugroup".
> 
> This breaks some things, e.g. file sharing between a working group.
> 
> Does anyone know how to work around this?  That is, is this a known
> problem or do we have some sort of configuration problem?

Look at the man page for "chmod".  You need to set the sticky bit for 
group on that directory.