On Mon, Mar 07, 2011, Robert Grasso wrote: >Hello, >On my opinion, grep is not powerful enough in order to achieve what you >want. It would be preferable to use at least some (old but powerful) tools >such sed, awk, or even better : perl. Actually, what you need is a tool >providing a capture buffer (this is perl jargon - "back references" in sed >jargon) in which you can get the string you want to extract, rather than >trying to build up a positive matching regex, as the string boundaries seem >to be easy enough to describe with regexs. One can use pcregrep which is grep that groks perl regular expressions. Bill -- INTERNET: bill at celestial.com Bill Campbell; Celestial Software LLC URL: http://www.celestial.com/ PO Box 820; 6641 E. Mercer Way Voice: (206) 236-1676 Mercer Island, WA 98040-0820 Fax: (206) 232-9186 Skype: jwccsllc (206) 855-5792 If the government can take a man's money without his consent, there is no limit to the additional tyranny it may practise upon him; for, with his money, it can hire soldiers to stand over him, keep him in subjection, plunder him at discretion, and kill him if he resists. Lysander Spooner, 1852