1#!/bin/sh 2# Copyright (c) 2010 Roy Marples 3# All rights reserved 4 5# pdnsd subscriber for resolvconf 6 7# Redistribution and use in source and binary forms, with or without 8# modification, are permitted provided that the following conditions 9# are met: 10# * Redistributions of source code must retain the above copyright 11# notice, this list of conditions and the following disclaimer. 12# * Redistributions in binary form must reproduce the above 13# copyright notice, this list of conditions and the following 14# disclaimer in the documentation and/or other materials provided 15# with the distribution. 16# 17# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 20# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 21# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 22# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 23# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 27# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 29[ -f "@SYSCONFDIR@"/resolvconf.conf ] || exit 0 30. "@SYSCONFDIR@/resolvconf.conf" || exit 1 31[ -z "$pdnsd_conf" -a -z "$pdnsd_resolv" ] && exit 0 32[ -z "$RESOLVCONF" ] && eval "$(@PREFIX@/sbin/resolvconf -v)" 33 34: ${pdnsd_restart:=pdnsd-ctl config $pdnsd_conf} 35signature="# Generated by resolvconf" 36signature_end="# End of resolvconf" 37 38# We normally use sed to remove markers from a configuration file 39# but sed may not always be available at the time. 40remove_markers() 41{ 42 local m1="$1" m2="$2" x= line= in_marker=0 43 44 shift; shift 45 if type sed >/dev/null 2>&1; then 46 sed "/^$m1/,/^$m2/d" $@ 47 else 48 for x; do 49 while read line; do 50 case "$line" in 51 "$m1"*) in_marker=1;; 52 "$m2"*) in_marker=0;; 53 *) [ $in_marker = 0 ] && echo "$line";; 54 esac 55 done < "$x" 56 done 57 fi 58} 59 60# Compare two files 61# If different, replace first with second otherwise remove second 62change_file() 63{ 64 if [ -e "$1" ]; then 65 if type cmp >/dev/null 2>&1; then 66 cmp -s "$1" "$2" 67 elif type diff >/dev/null 2>&1; then 68 diff -q "$1" "$2" >/dev/null 69 else 70 # Hopefully we're only working on small text files ... 71 [ "$(cat "$1")" = "$(cat "$2")" ] 72 fi 73 if [ $? -eq 0 ]; then 74 rm -f "$2" 75 return 1 76 fi 77 fi 78 cat "$2" > "$1" 79 rm -f "$2" 80 return 0 81} 82 83newresolv="# Generated by resolvconf\n" 84changed=false 85 86if [ -n "$pdnsd_resolv" ]; then 87 for n in $NAMESERVERS; do 88 newresolv="${newresolv}nameserver $n\n" 89 done 90fi 91 92if [ -n "$pdnsd_conf" ]; then 93 cf="$pdnsd_conf.new" 94 newconf= 95 96 if [ -z "$pdnsd_resolv" ]; then 97 newconf="${newconf}server {\n" 98 newconf="${newconf}\tlabel=resolvconf;\n" 99 if [ -n "$NAMESERVERS" ]; then 100 newconf="${newconf}\tip=" 101 first=true 102 for n in $NAMESERVERS; do 103 if $first; then 104 first=false 105 else 106 newconf="${newconf}," 107 fi 108 newconf="$newconf$n" 109 done 110 newconf="${newconf};\n" 111 fi 112 newconf="${newconf}}\n" 113 fi 114 115 for d in $DOMAINS; do 116 newconf="${newconf}server {\n" 117 newconf="${newconf}\tinclude=.${d%%:*}.;\n" 118 newconf="${newconf}\tpolicy=excluded;\n" 119 newconf="${newconf}\tip=" 120 ns="${d#*:}" 121 while [ -n "$ns" ]; do 122 newconf="${newconf}${ns%%,*}" 123 [ "$ns" = "${ns#*,}" ] && break 124 ns="${ns#*,}" 125 newconf="${newconf}," 126 done 127 newconf="${newconf};\n}\n" 128 done 129 130 rm -f "$cf" 131 remove_markers "$signature" "$signature_end" "$pdnsd_conf" > "$cf" 132 if [ -n "$newconf" ]; then 133 echo "$signature" >> "$cf" 134 printf %s "$newconf" >> "$cf" 135 echo "$signature_end" >> "$cf" 136 fi 137 if change_file "$pdnsd_conf" "$cf"; then 138 changed=true 139 fi 140fi 141 142if [ -n "$pdnsd_resolv" ]; then 143 if [ ! -f "$pdnsd_resolv" ] || \ 144 [ "$(cat "$pdnsd_resolv")" != "$(printf %s "$newresolv")" ] 145 then 146 changed=true 147 printf %s "$newresolv" >"$pdnsd_resolv" 148 fi 149fi 150 151if $changed; then 152 eval $pdnsd_restart 153fi 154