On Thu, 11 Feb 1999, James FitzGibbon wrote:
> ${if and{
> {match{$local_part}{^\\d+\$}}
> {def:${lookup ldapauth {$local_part:control} {$value} fail}}
> } {1} {0} }
>
> But in both test_expand and verification through exim, I get the message
>
> Failed: unknown variable:
That error almost always means you have a $ that is not escaped when it
should be. Is this condition quoted inside double quotes or not?
Oh. Wait a minute. What's that def: doing there? def: must be followed
by a variable name. *That's* the empty variable it is complaining about.
I should improve the error message. (Makes note.)
You need to use ${if eq{something}{}{...}{...}} to test for an empty
string.
--
Philip Hazel University of Cambridge Computing Service,
ph10@??? Cambridge, England. Phone: +44 1223 334714.
--
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