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-rw-r--r--pdnsd.in153
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+#!/bin/sh
+# Copyright (c) 2010 Roy Marples
+# All rights reserved
+
+# pdnsd subscriber for resolvconf
+
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following
+# disclaimer in the documentation and/or other materials provided
+# with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+[ -f "@SYSCONFDIR@"/resolvconf.conf ] || exit 0
+. "@SYSCONFDIR@/resolvconf.conf" || exit 1
+[ -z "$pdnsd_conf" -a -z "$pdnsd_resolv" ] && exit 0
+[ -z "$RESOLVCONF" ] && eval "$(@PREFIX@/sbin/resolvconf -v)"
+
+: ${pdnsd_restart:=pdnsd-ctl config $pdnsd_conf}
+signature="# Generated by resolvconf"
+signature_end="# End of resolvconf"
+
+# We normally use sed to remove markers from a configuration file
+# but sed may not always be available at the time.
+remove_markers()
+{
+ local m1="$1" m2="$2" x= line= in_marker=0
+
+ shift; shift
+ if type sed >/dev/null 2>&1; then
+ sed "/^$m1/,/^$m2/d" $@
+ else
+ for x; do
+ while read line; do
+ case "$line" in
+ "$m1"*) in_marker=1;;
+ "$m2"*) in_marker=0;;
+ *) [ $in_marker = 0 ] && echo "$line";;
+ esac
+ done < "$x"
+ done
+ fi
+}
+
+# Compare two files
+# If different, replace first with second otherwise remove second
+change_file()
+{
+ if [ -e "$1" ]; then
+ if type cmp >/dev/null 2>&1; then
+ cmp -s "$1" "$2"
+ elif type diff >/dev/null 2>&1; then
+ diff -q "$1" "$2" >/dev/null
+ else
+ # Hopefully we're only working on small text files ...
+ [ "$(cat "$1")" = "$(cat "$2")" ]
+ fi
+ if [ $? -eq 0 ]; then
+ rm -f "$2"
+ return 1
+ fi
+ fi
+ cat "$2" > "$1"
+ rm -f "$2"
+ return 0
+}
+
+newresolv="# Generated by resolvconf\n"
+changed=false
+
+if [ -n "$pdnsd_resolv" ]; then
+ for n in $NAMESERVERS; do
+ newresolv="${newresolv}nameserver $n\n"
+ done
+fi
+
+if [ -n "$pdnsd_conf" ]; then
+ cf="$pdnsd_conf.new"
+ newconf=
+
+ if [ -z "$pdnsd_resolv" ]; then
+ newconf="${newconf}server {\n"
+ newconf="${newconf}\tlabel=resolvconf;\n"
+ if [ -n "$NAMESERVERS" ]; then
+ newconf="${newconf}\tip="
+ first=true
+ for n in $NAMESERVERS; do
+ if $first; then
+ first=false
+ else
+ newconf="${newconf},"
+ fi
+ newconf="$newconf$n"
+ done
+ newconf="${newconf};\n"
+ fi
+ newconf="${newconf}}\n"
+ fi
+
+ for d in $DOMAINS; do
+ newconf="${newconf}server {\n"
+ newconf="${newconf}\tinclude=.${d%%:*}.;\n"
+ newconf="${newconf}\tpolicy=excluded;\n"
+ newconf="${newconf}\tip="
+ ns="${d#*:}"
+ while [ -n "$ns" ]; do
+ newconf="${newconf}${ns%%,*}"
+ [ "$ns" = "${ns#*,}" ] && break
+ ns="${ns#*,}"
+ newconf="${newconf},"
+ done
+ newconf="${newconf};\n}\n"
+ done
+
+ rm -f "$cf"
+ remove_markers "$signature" "$signature_end" "$pdnsd_conf" > "$cf"
+ if [ -n "$newconf" ]; then
+ echo "$signature" >> "$cf"
+ printf "$newconf" >> "$cf"
+ echo "$signature_end" >> "$cf"
+ fi
+ if change_file "$pdnsd_conf" "$cf"; then
+ changed=true
+ fi
+fi
+
+if [ -n "$pdnsd_resolv" ]; then
+ if [ ! -f "$pdnsd_resolv" ] || \
+ [ "$(cat "$pdnsd_resolv")" != "$(printf "$newresolv")" ]
+ then
+ changed=true
+ printf "$newresolv" >"$pdnsd_resolv"
+ fi
+fi
+
+if $changed; then
+ eval $pdnsd_restart
+fi