Re: Matching literal dot in To

On 2015-06-14 15:50, Erik Christiansen wrote:
> On 14.06.15 08:30, Chuck Martin wrote:
>> On Sun, Jun 14, 2015 at 07:38:30PM +1000, Erik Christiansen wrote:

>>> We need another tweak. This will be a great deal closer:
>>>
>>>     * ^TO_.*\<[^.@ ]+\.[^.@ ]+@
>>>
>>> That will not leap to the end of a mismatched address, but slide off it
>>> in stages, because '\<' is only shorthand for `[^a-zA-Z0-9_]'. But we
>>> needn't fuss over a lost microsecond here or there. It should do the job
>>> now.
>>
>> That will miss an address like [email protected].
>
> That is not within the stated parameters. The stated goal is to detect
> xxx.yyy@zzz But even if we assume that you have imagined a real need,
> that does not mean that your "It may be necessary" is in any way
> required.
>
> Since '\<' is only shorthand for `[^a-zA-Z0-9_]', it is only necessary
> to substitute the negative character class for the shorthand, and extend
> it to [^a-zA-Z0-9_+].
>
> Whether that is considered worth doing, we can but ask.

I didn't test it yet, but I think that .* is non-greedy outside of 
matches (and greedy within), so it should work fine also for plussed 
addresses.

So let's do a test:

$ cat testrc
#!/usr/bin/procmail -m

LOGABSTRACT=no
VERBOSE=no

n="
"
LOG="${n}Starting ...$n"

:0
* ^TO_.*\<[^.@ ]+\.[^.@ ]+@
{
   LOG="FOUND$n"
}

:0
* ^TO_.*\<\/[^.@ ]+\.[^.@ ]+@[^, ]+
{
   LOG="MATCH: $MATCH$n"
}

LOG="Done.$n$n"

- - - - - -

$ chmod -vv u+x testrc
testrc: 0100644 [-rw-r--r-- ] -> 0100744 [-rwxr--r-- ]

- - - - - -

$ echo "To: [email protected] [email protected] [email protected]" | ./testrc

Starting ...
FOUND
MATCH: [email protected]
Done.

-- 
Greetings, Ruud