On Mon, 16 Apr 2007, Udi Mottelo wrote:
On Sun, 15 Apr 2007, David W. Tamkin wrote:
Udi,
Some examples to show that \< can be substitute for NEWLINE
but, not all the times:
:0 HB
* aaa(.*\<)?bbb
{ HOST= }
Actually, what you've proved is that . cannot match newline, which we
know. Here's what you thought was a counterexample:
prompt# echo -e 'aaaQQQ\012PPP\012bbb' | procmail ./proc
...
procmail: No match on "aaa(.*\<)?bbb"
Since your expression allows zero or one matches to (.*\<) but not more
than one, you're requiring either the first newline to match dot, which
it won't, or the P after the first newline to match b, which it doesn't.
If your regexp were
aaa(.*\<)*bbb
or
aaa(.*\<)+bbb
either of which allows for more than one occurrence of .*\< between aaa
and bbb, the text would have matched.
But look in this example:
prompt# echo -e 'aaaQQQ+PPP+bbb' | procmail ./proc
...
procmail: Match on "aaa(.*\<)?bbb"
Why match? The + is \<
It match because . takes the first +
Bye,
Udi
____________________________________________________________
procmail mailing list Procmail homepage: http://www.procmail.org/
procmail(_at_)lists(_dot_)RWTH-Aachen(_dot_)DE
http://MailMan.RWTH-Aachen.DE/mailman/listinfo/procmail