[H-GEN] Scripting guide

[Jason Parker-Burlingham]

On 5/25/06, Greg Black <gjb at gbch.net> wrote:
> On 2006-05-25, Jason Parker-Burlingham wrote:
> > What you want is:
> >  awk '/([0-9]+\.)+[0-9]+/ {print $8,$13}' \
> >  /var/log/apache/error.log.1
> >
> > I'm not sure if + is a GNU extension to awk, but [0-9][0-9]* will do in its
> > place.
>
> I was going to leave this topic alone, but this historical
> element got me in.  I have nothing handy on my shelf prior to
> 1984, but I can assure you that basic regular expressions have
> used the '+' since at least that far back.  I'm pretty sure it
> dates from the early 1970's, certainly before there was such a
> thing as GNU.

The reason I mentioned it is that i I'm remembering correctly---and NetBSD
grep bears me out---the plus sign is a part of the extended regular
expression syntax.  My question was whether or not awk's extended regular
expression support was a GNU extension.

Looking back over what I wrote, that was much less than clear.  Thanks for
your input.

jason, doing a lot of calls to egrep lately