Re: NetBSD and User Private Groups (Unique Groups)

[Ottavio Caruso <ottavio2006-degen%yahoo.com@localhost>]

On 29/01/2020 10:02, Manuel Bouyer wrote:
> On Wed, Jan 29, 2020 at 09:36:02AM +0000, Ottavio Caruso wrote:
> > Hi,
> >
> > I'm using 9.0_RC1, so I don't know if this is a functionality that was used
> > in the past and then dropped or will be introduced in the future.
> >
> > At one point in time, probably around 10+ years ago, Red Hat introduced User
> > Private Groups [1]. I ignore if other OSes have had this feature before
> > (probably Mac OSX ?). Anyway, this has then spread to all other major Linux
> > distros. FreeBSD calls them "unique groups" [2]. OpenBSD has this line in
> > /etc/usermgmt.conf:
> >
> > group           =uid
>
> I never understood how this would be usefull

[I forgot to cc: the list. Manuel, sorry for the duplicate]

I wonder how this can possibly _not_ be useful.

On a multi user system, all files are created readable by the group 
(umask 022). If we are all in the same group, anybody can read my newly 
created files (imagine a local password file for alpine or ssl certs for 
irc, etc). It's then left to the user to change umask and/or adjust 
permissions. Why not just make it easier for the user?

--
Ottavio Caruso