[ILUG] procmail receipe

[Brian Foster]

  | Date: Tue, 24 Aug 2004 14:37:18 +0100 (IST)
  | From: Paul Jakma <paul at clubi.ie>
  | 
  | On Tue, 24 Aug 2004, Darragh Bailey wrote:
  | [... ranges in regular expressions ] might be a gnu egrep extension ;) - 
  | original egrep mightnt support POSIX bounds - not many things do 
  | actually.).

 AFAICR w/o bothering to actually check, ranges are part
 of POSIX.2 EREs (Extended REs), and hence are supposed
 to be by any tool which supports/uses EREs.  and it is
 EREs which are not supported by many tools, or which
 are "activated" only by a special flag/option/silliness,
 such as -E in GNUs egrep(1).     that may make sense
 because some BREs (Basic REs, what everyone is used to) 
 are not valid EREs and/or change, so there is a backwords
 compatibility problem here --- _lots_ of scripts etc use
 BREs, so just changing all the tools to default to EREs
 is very liable/likely to break things ....  ;-\ 

cheers (trying to remember his POSIX.[12] work from a
few too many years ago)!
	-blf-
-- 
«How many surrealists does it take to    |  Brian Foster      Montpellier,
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