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Re: About valid and invalid user names

On Sun, 06 Feb 2005 12:31:39 +0100, Florian Weimer <fw@deneb.enyo.de>
>The current --force-badname check is /^[A-Za-z_][-_A-Za-z0-9]*\$?$/.
>Wouldn't it make more sense to add the "." just to the second
>character class?

That one wouldn't solve the "I want my usernames to start with a
digit" issue.

>  User names starting with "-" could be truly awful.

But a local problem, in that case.

>Even if a custom regular expression has been configured, you should
>check for "\n" and ":" in user names and reject them, just to be sure
>(and maybe a few more funny characters).

Just being sure will prompt strange bug reports. There is always
useradd doing its own checks behind though.


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