#! /bin/sed -f # uniq-u.sed -- uniq lines on a sorted input # $Id: uniq-u.sed,v 1.2 1998/07/06 20:31:27 cdua Exp $ # Carlos Duarte, 960909/960910 # print all uniq lines on a sorted input: no copies of duplicated lines # like `uniq' $b N /^\(.*\)\n\1$/!{ P D } :c $d s/.*\n// N /^\(.*\)\n\1$/bc D