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Bug#105364: installer allows user to insert underscores in the hostname

* Matt Kraai 

| On Sun, Jul 15, 2001 at 07:20:59PM +0200, Eduard Bloch wrote:
| > I was helping a new user to configure his woody installation, and was
| > surprised by some "funny" messages from misc. config script. First, I
| > could find the reason, then I realized that he used an _ underscore in
| > the hostname. Normally this must not be used, but the installer allowed
| > him to do so and "hostname" does not complain about "broken" strings, so
| > the this may be reproduced by newbies, sooner or later. We should
| > install something to check the entries, IMHO.
| The following patch checks the input for RFC 608 compliance.  OK
| to apply?


| +  static const char *valid_hostname_chars =
| +	  "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-";

What about non-ascii hostnames?  I know they are not allowed according
to RFC608, but there are WIPs for it, which we might want to support
it nevertheless.


Tollef Fog Heen
You Can't Win

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