Re: lookup function with no regular expresion

Fernando Gozalo writes:

> El 06/11/10 01:11, Sam Varshavchik escribió:
>> Fernando Gozalo writes:
>>
>>> Hello,
>>>
>>>>> I need to know if there is an 'option' I can pass to the builtin
>>>>> 'lookup' function such as it treat 'expr' as pure text and not as a
>>>>> regular expression.
>>>>
>>>> Use the escape() function, then pass the result to lookup().
>>>
>>> I don't get the results that I expect. I want to find email addresses
>>> in a file.
>>>
>>> [fgozalo <at> lunes ~]$ cat archivo
>>> fgozalo <at> csi.uned.es
>>> fgozalo+prueba1 <at> csi.uned.es
>>>
>>>
>>> - Without escape():
>>>
>>> lookup("fgozalo <at> csi.uned.es", "archivo") ==> MATCH
>>> lookup("fgozalo+prueba1 <at> csi.uned.es", "archivo") ==> NO MATCH
>>>
>>> - With escape():
>>>
>>> lookup("fgozalo <at> csi\.uned\.es", "archivo") ==> NO MATCH
>>> lookup("fgozalo\+prueba1 <at> csi\.uned\.es", "archivo") ==> NO MATCH
>>
>> Sorry -- I got confused a little bit, here.
>>
>> It's the /external file/ that contains regular expressions, that get
>> matched against the literal string you pass to lookup(). So, what you want:
>>
>> [mrsam <at> octopus maildrop]$ cat archivo
>> ^fgozalo <at> csi\.uned\.es$
>> ^fgozalo\+prueba1 <at> csi\.uned\.es$
>>
>> Then, use lookup("fgozalo <at> csi.uned.es", "archivo"), etc…
> 
> I've read again the definition of lookup() and seen "filename is a name 
> of a file containing *a list of patterns*". Sorry.
> 
> Well, I explain what I need:
> 
> The /external file/ contains email addresses, not regular expressions. 
> In the example file (archivo) the "." and "+" are not wildcards, are 
> separators.
> 
> I need to look for "fgozalo+prueba1 <at> csi.uned.es" in "archivo" and have a 
> hit. Can I do it with lookup()? or with a combination of builtin functions?

You'll have to use an external script to do that, and invoke it from a 
maildrop recipe.

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