Date: Fri, 12 Oct 2001 13:56:36 -0700 From: "Crist J. Clark" <cristjc@earthlink.net> To: Yar Tikhiy <yar@FreeBSD.ORG> Cc: hackers@FreeBSD.ORG Subject: Re: Valid user name Message-ID: <20011012135636.L293@blossom.cjclark.org> In-Reply-To: <20011012145227.D46577@snark.rinet.ru>; from yar@FreeBSD.ORG on Fri, Oct 12, 2001 at 02:52:28PM %2B0400 References: <20011012145227.D46577@snark.rinet.ru>
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On Fri, Oct 12, 2001 at 02:52:28PM +0400, Yar Tikhiy wrote:
> Hi there,
>
> Now adduser(8) and pw(8) differ in what a valid user name is.
> Adduser(8) enforces a user name to match the /^[a-z0-9_][a-z0-9_\-]*$/
> regexp. OTOH, pw(8) uses the Good Old Wrong Way of checking validity--
> it checks a user name against a list of *invalid* characters.
>
> I'm going to fix pw(8) so its view on valid user names is consistent
> with that of adduser(8).
>
> 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.
The historical reason '.' is avoided is because it breaks,
# chown user.group file
Syntax. See the COMPATIBILITY section of chown(8).
--
Crist J. Clark | cjclark@alum.mit.edu
| cjclark@jhu.edu
http://people.freebsd.org/~cjc/ | cjc@freebsd.org
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