Subject: Re: useradd: spaces and $ in usernames
To: None <firstname.lastname@example.org>
From: der Mouse <mouse@Rodents.Montreal.QC.CA>
Date: 11/15/2001 20:05:07
> In particular, NIS does not handle unprintable characters anywhere
> with any degree of decorum. Keep your "NIS is bad" to yourself.
> It's still used, and we can't break that.
Um..._allowing_ characters that break NIS doesn't constitute breaking
NIS, especially if we splash warnings all over the manpages - and
perhaps at runtime; ISTM it would make sense to warn if NIS is enabled
and such a username is added.
But...what breaks? I once had to work with NIS, and I don't recall
anything in there that would break with nonprintables (except for
newline and possibly tab...oh, and NUL).
> I was able to change my password once to something with a control
> char in it, but it wouldn't let me change it back because of that
> control char.
Odd. Sure you were typing your lnext character where appropriate?
> I suspect one might run into similar problems with usernames. If
> someone can test this with usernames and prove me wrong, I'd love to
> hear about it. 8-D
I just now created a user called t\2u (C-style) or t\^Bu (vis(3)
style). Except that my shell won't let me use ~t^Bu to refer to its
home directory (probably because it considers ^B a non-letter),
everything seemed to work. I set a password, logged in over a "telnet
127.0.0.1" connection, logged out....
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