Andriy Sen <apsen <at> hotmail.com> writes: > G:\>cat test.s | grep -P "^(|[^0])1" > 1 Useless use of cat. It is more efficient to write: grep -P "^(|[^0])1" test.s -- Eric Blake -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/