1# $NetBSD: join.awk,v 1.3 2008/04/30 13:10:49 martin Exp $ 2# 3# Copyright (c) 2002 The NetBSD Foundation, Inc. 4# All rights reserved. 5# 6# This code is derived from software contributed to The NetBSD Foundation 7# by Luke Mewburn of Wasabi Systems. 8# 9# Redistribution and use in source and binary forms, with or without 10# modification, are permitted provided that the following conditions 11# are met: 12# 1. Redistributions of source code must retain the above copyright 13# notice, this list of conditions and the following disclaimer. 14# 2. Redistributions in binary form must reproduce the above copyright 15# notice, this list of conditions and the following disclaimer in the 16# documentation and/or other materials provided with the distribution. 17# 18# THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19# ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28# POSSIBILITY OF SUCH DAMAGE. 29# 30# join.awk F1 F2 31# Similar to join(1), this reads a list of words from F1 32# and outputs lines in F2 with a first word that is in F1. 33# Neither file needs to be sorted 34 35BEGIN \ 36{ 37 if (ARGC != 3) { 38 printf("Usage: join file1 file2\n") >"/dev/stderr" 39 exit 1 40 } 41 while ( (getline < ARGV[1]) > 0) 42 words[$1] = $0 43 delete ARGV[1] 44} 45 46$1 in words \ 47{ 48 f1=$1 49 $1="" 50 print words[f1] $0 51} 52