[Pkg-shadow-devel] [shadow-maint/shadow] Allow dots (`.`) in user/group names (#34)

[Nicolas François]

Hi Serge,

Even with such patch, I assume that there will still be the need for a
Debian patch, and another one on fedora, ...
That's what does not make me so confortable here.

-- 
Nekral

2016-09-13 6:36 GMT-07:00 Serge E. Hallyn <serge at hallyn.com>:

> On Mon, Sep 12, 2016 at 05:12:43PM -0700, Nicolas François wrote:
> > Hi,
> >
> > is_valid_name() is one of the functions that varies depending on the
> > distributions.
> >
> > One historical reason for forbidding periods in user/group names is that
> it
> > was used by BSD's chown to separate username and groupname.
> > I could find this reference:
> > http://pubs.opengroup.org/onlinepubs/9699919799/utilities/chown.html
> >
> > Also any program could have its own regex and reject / accept usernames
> (I
> > don't know any standard username regex definition). Although, since much
> > more relaxed policy have been used for a while (for example on Debian:
> > https://github.com/Distrotech/shadow-utils/blob/distrotech-
> shadow-utils/debian/patches/506_relaxed_usernames)
> > allowing periods should be quite safe.
> >
> > Best Regards,
> > --
> > Nekral
>
> Thanks!  So it sounds like a patch which allows '.' but adds a
> configure option to enable that would be the way to go.
>
> thanks,
> -serge
>
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