1#!/usr/bin/nawk -f 2# 3# CDDL HEADER START 4# 5# The contents of this file are subject to the terms of the 6# Common Development and Distribution License, Version 1.0 only 7# (the "License"). You may not use this file except in compliance 8# with the License. 9# 10# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 11# or http://www.opensolaris.org/os/licensing. 12# See the License for the specific language governing permissions 13# and limitations under the License. 14# 15# When distributing Covered Code, include this CDDL HEADER in each 16# file and include the License file at usr/src/OPENSOLARIS.LICENSE. 17# If applicable, add the following below this CDDL HEADER, with the 18# fields enclosed by brackets "[]" replaced with your own identifying 19# information: Portions Copyright [yyyy] [name of copyright owner] 20# 21# CDDL HEADER END 22# 23# 24#ident "%Z%%M% %I% %E% SMI" 25# 26# Copyright (c) 1996, by Sun Microsystems, Inc. 27# All rights reserved. 28# 29# Awk code to handle the creation of the YP_MULTI_ entries 30# in the hosts.byname map. Called by multi directly. 31# 32 33{ 34 # Here we loop through the list of hostnames 35 # doing two separate things... 36 # First, we're building a list of hostnames 37 # for the current IP address ($1). 38 # Second, if we've seen a name before then 39 # we add the current address ($1) to a list 40 # of address associated with this particular 41 # name ($i). 42 # 43 # Note, that we're pretty careful about keeping 44 # out duplicates (and this has a cost). 45 46 for (i = 2; i <= NF; i++) { 47 # Make the namelist for this address 48 if (namelist[$1] == "") { 49 namelist[$1] = $i; 50 } else if (namelist[$1] == $i) { 51 ; 52 } else if (index(namelist[$1], $i) == 0) { 53 namelist[$1] = namelist[$1] " " $i; 54 } else { 55 nf = 1; 56 numnames = split(namelist[$1], n); 57 for (j = 1; j <= numnames; j++) { 58 if (n[j] == $i) { 59 nf = 0; 60 break; 61 } 62 } 63 if (nf) { 64 namelist[$1] = namelist[$1] " " $i; 65 nf = 0; 66 } 67 } 68 69 # Do we have an address for this name? 70 # If not, and it's not already there, add it. 71 if (addr[$i] == "") { 72 addr[$i] = $1; 73 } else if (index(addr[$i], $1) == 0) { 74 addr[$i] = addr[$i] "," $1 75 } 76 } 77} 78 79END { 80 # There are now a bunch o addresses in the addr 81 # array that are actually lists. We go through 82 # all of them here and build a list of hostname 83 # aliases into the namelist array. 84 # 85 for (host in addr) { 86 if (index(addr[host], ",") == 0) 87 continue; 88 numaddr = split(addr[host], tmpaddr, ","); 89 for (i = 1; i <= numaddr; i++) { 90 numnames = split(namelist[tmpaddr[i]], tmpname); 91 for (j = 1; j <= numnames; j++) { 92 if (namelist[addr[host]] == "") { 93 namelist[addr[host]] = tmpname[j]; 94 continue; 95 } 96 if (namelist[addr[host]] == tmpname[j]) { 97 continue; 98 } 99 if (index(namelist[addr[host]], tmpname[j]) == 0) { 100 namelist[addr[host]] = namelist[addr[host]] " " tmpname[j]; 101 continue; 102 } else { 103 nf = 1; 104 for (k = 1; k <= numnames; k++) { 105 if (tmpname[j] == tmpname[k]) { 106 nf = 0; 107 break; 108 } 109 } 110 if (nf == 1) { 111 namelist[addr[host]] = namelist[addr[host]] " " tmpname[j]; 112 nf = 1; 113 } 114 } 115 } 116 } 117 } 118 119 # Now do that funky output thang... 120 for (host in addr) { 121 if (index(addr[host], ",")) { 122 printf("YP_MULTI_"); 123 } 124 printf("%s %s\t%s\n", 125 host, addr[host], namelist[addr[host]]); 126 } 127} 128