On Thu, 29 Oct 1998, Paul Mansfield wrote:
> Now, I've been worrying about the way you can do wildcard subdomains. If you
> use 'partial-dbm' instead of 'dbm' to do wildcard lookups, then 'customer.com'
> and 'sub.customer.com' would both work as intended, but also you'd have the
> side-effect that 'noncustomer.com' would also work!
No. Partial lookups do not work in the same way as * in literal strings.
They work on a component basis (see 6.5). If a dbm file's key is
*.customer.com
it matches customer.com and anything.customer.com but not anythingcustomer.com.
I see that the two different uses of * can be confusing. It is a pity I
didn't use some other character when partial matching was introduced,
but * did seem to be the natural one at the time.
--
Philip Hazel University of Cambridge Computing Service,
ph10@??? Cambridge, England. Phone: +44 1223 334714.
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