Date: Sat, 13 Oct 2001 13:05:10 +0400 From: Yar Tikhiy <yar@FreeBSD.ORG> To: Peter Pentchev <roam@ringlet.net> Cc: Warner Losh <imp@harmony.village.org>, hackers@FreeBSD.ORG Subject: Re: Valid user name Message-ID: <20011013130510.B93286@snark.rinet.ru> In-Reply-To: <20011012192457.A74895@straylight.oblivion.bg> References: <20011012145227.D46577@snark.rinet.ru> <200110121552.f9CFqA793345@harmony.village.org> <20011012192457.A74895@straylight.oblivion.bg>
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On Fri, Oct 12, 2001 at 07:24:57PM +0300, Peter Pentchev wrote:
> On Fri, Oct 12, 2001 at 09:52:10AM -0600, Warner Losh wrote:
> > In message <20011012145227.D46577@snark.rinet.ru> Yar Tikhiy writes:
> > : Is there any reason to omit the period ('.') from the list of valid
> > : characters? With the period included, the list would conform to
> > : POSIX's definition of a valid user name.
> >
> > Not any more. it used to be that chown user.group would be
> > ambiguous. now it isn't, since user:group is the right syntax.
>
> This might be a problem for NIS or Kerberos domains - an older version
> of FreeBSD might be confuzzled by usernames which are perfectly valid
> for the rest of the client boxes.
Oh, I see. Given that the only issue about the period in user names
is compatibility, should pw(8) and adduser(8) still reject it or accept
it and print a warning? I think printing a warning is better since
the validity check is by no means a panacea--a stupid admin can always
use vipw(8) to create any kind of an invalid user name.
--
Yar
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