Date: Mon, 14 Jul 2003 17:55:36 -0700 (PDT) From: Thomas McIntyre <temac@yahoo.com> To: hawkeyd@visi.com Cc: listone@deathbeforedecaf.net Subject: Re: sed(1) regular expression gurus Message-ID: <20030715005536.45555.qmail@web14202.mail.yahoo.com>
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Dave wrote:
> This is better than anything I've dreamed up with sed or awk, and
> is really close, but it fails on this:
> by nospam.mc.mpls.visi.com (8.11.6/8.11.6.2) with ESMTP id
3A4E07B03
I know you want to avoid perl, but this kind of problem is it's
sweet spot. The following might be incrementally better (though the
expression to recognize a dotted quad is technically incorrect):
perl -ne '
next unless /^by/;
@f=(split)[1..2];
$_=pop @f;
s/^\D*//g;
s/\D*$//g;
push(@f,$_) if /^(\d{1,3}\.){3}(\d{1,3})$/;
print join(" ", @f)."\n";
'
I'm not fluent enough to translate it but I think awk has all the
required features to do so.
Tom McIntyre
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