#!/bin/sh
# Copyright 2006 Gentoo Foundation
-# Distributed under the terms of the GNU General Public License v2
-
-# libc resolv.conf updater
-
-# Written by Roy Marples (uberlord@gentoo.org)
-# Heavily based on Debian resolvconf by Thomas Hood
-
-[ "$(readlink /etc/resolv.conf 2>/dev/null)" \
- != "resolvconf/run/resolv.conf" ] && exit 0
-
-RESOLVCONF="$(resolvconf -l)"
-BASE="/etc/resolvconf/resolv.conf.d/base"
+# Copyright 2007 Roy Marples
+# All rights reserved
+
+# libc 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.
+
+PREFIX=
+RESOLVCONF="${PREFIX}"/etc/resolvconf
+RESOLVCONFS="$(resolvconf -l)"
+BASE="${RESOLVCONF}/resolv.conf.d/base"
uniqify() {
local result=
- while [ -n "$1" ] ; do
+ while [ -n "$1" ]; do
case " ${result} " in
*" $1 "*) ;;
*) result="${result} $1" ;;
}
OUR_NS=
-if [ -e "${BASE}" ] ; then
+if [ -e "${BASE}" ]; then
OUR_NS="$(sed -n -e 's/^[[:space:]]*nameserver[[:space:]]*//p' "${BASE}")"
fi
OUR_NS="$(uniqify \
${OUR_NS} \
- $(echo "${RESOLVCONF}" \
+ $(echo "${RESOLVCONFS}" \
| sed -n -e 's/^[[:space:]]*nameserver[[:space:]]*//p') \
)"
i=0
NS=
LOCALH=false
-for N in ${OUR_NS} ; do
+for N in ${OUR_NS}; do
i=$((${i} + 1))
NS="${NS} ${N}"
[ "${i}" = "3" ] && break
# the order given to us.
OUR_SEARCH=
if ${LOCALH} ; then
- if [ -e "${BASE}" ] ; then
+ if [ -e "${BASE}" ]; then
OUR_SEARCH="$(sed -n -e 's/^[[:space:]]*search[[:space:]]*//p' "${BASE}")"
fi
- OUR_SEARCH="${OUR_SEARCH} $(echo "${RESOLVCONF}" \
+ OUR_SEARCH="${OUR_SEARCH} $(echo "${RESOLVCONFS}" \
| sed -n 's/^[[:space:]]*search[[:space:]]*//p')"
- if [ -e "${BASE}" ] ; then
+ if [ -e "${BASE}" ]; then
OUR_SEARCH="${OUR_SEARCH} $(sed -n -e 's/^[[:space:]]*domain[[:space:]]*//p' "${BASE}")"
fi
- OUR_SEARCH="${OUR_SEARCH} $( echo "${RESOLVCONF}" \
+ OUR_SEARCH="${OUR_SEARCH} $( echo "${RESOLVCONFS}" \
| sed -n -e 's/^[[:space:]]*domain[[:space:]]*//p')"
else
- if [ -e "${BASE}" ] ; then
+ if [ -e "${BASE}" ]; then
OUR_SEARCH="$(sed -n -e 's/^[[:space:]]*search[[:space:]]*//p' \
-e 's/^[[:space:]]*domain[[:space:]]*//p' "${BASE}")"
fi
- OUR_SEARCH="${OUR_SEARCH} $(echo "${RESOLVCONF}" \
+ OUR_SEARCH="${OUR_SEARCH} $(echo "${RESOLVCONFS}" \
| sed -n -e 's/^[[:space:]]*search[[:space:]]*//p' \
-e 's/^[[:space:]]*domain[[:space:]]*//p')"
fi
# libc only allows for 6 search domains
i=0
SEARCH=
-for S in $(uniqify ${OUR_SEARCH}) ; do
+for S in $(uniqify ${OUR_SEARCH}); do
i=$((${i} + 1))
SEARCH="${SEARCH} ${S}"
[ "${i}" = "6" ] && break
# Hold our new resolv.conf in a variable to save on temporary files
NEWCONF="# Generated by resolvconf\n"
-[ -e /etc/resolvconf/resolv.conf.d/head ] \
- && NEWCONF="${NEWCONF}$(cat /etc/resolvconf/resolv.conf.d/head)\n"
+[ -e "${RESOLVCONF}"/resolv.conf.d/head ] \
+ && NEWCONF="${NEWCONF}$(cat "${RESOLVCONF}"/resolv.conf.d/head)\n"
[ -n "${SEARCH}" ] && NEWCONF="${NEWCONF}${SEARCH}\n"
-for N in ${NS} ; do
+for N in ${NS}; do
NEWCONF="${NEWCONF}nameserver ${N}\n"
done
# Now dump everything else from our resolvs
-if [ -e "${BASE}" ] ; then
+if [ -e "${BASE}" ]; then
NEWCONF="${NEWCONF}$(sed -e '/^[[:space:]]*$/d' \
-e '/^[[:space:]]*nameserver[[:space:]]*.*/d' \
-e '/^[[:space:]]*search[[:space:]]*.*/d' \
fi
# We don't know we're using GNU sed, so we do it like this
-NEWCONF="${NEWCONF}$(echo "${RESOLVCONF}" | sed -e '/^[[:space:]]*$/d' \
+NEWCONF="${NEWCONF}$(echo "${RESOLVCONFS}" | sed -e '/^[[:space:]]*$/d' \
-e '/^[[:space:]]*#/d' \
-e '/^[[:space:]]*nameserver[[:space:]]*.*/d' \
-e '/^[[:space:]]*search[[:space:]]*.*/d' \
-e '/^[[:space:]]*domain[[:space:]]*.*/d' \
)"
-[ -e /etc/resolvconf/resolv.conf.d/tail ] \
- && NEWCONF="${NEWCONF}$(cat /etc/resolvconf/resolv.conf.d/tail)"
+[ -e "${RESOLVCONF}"/resolv.conf.d/tail ] \
+ && NEWCONF="${NEWCONF}$(cat "${RESOLVCONF}"/resolv.conf.d/tail)"
# Check if the file has actually changed or not
-if [ -e /etc/resolv.conf ] ; then
- [ "$(cat /etc/resolv.conf)" = "$(printf "${NEWCONF}")" ] && exit 0
+if [ -e "${RESOLVCONF}"/run/resolv.conf ]; then
+ [ "$(cat "${RESOLVCONF}"/run/resolv.conf)" = "$(printf "${NEWCONF}")" ] && exit 0
fi
# Create our resolv.conf now
-printf "${NEWCONF}" > /etc/resolvconf/run/resolv.conf
+printf "${NEWCONF}" > "${RESOLVCONF}"/run/resolv.conf
-# Restart nscd if it's running
-if [ -x /etc/init.d/nscd ] ; then
- /etc/init.d/nscd --nodeps --quiet conditionalrestart
-fi
+resolvconf -s nscd restart
# Notify users of the resolver
-for x in /etc/resolvconf/update-libc.d/* ; do
+for x in "${REVOLVCONF}"/update-libc.d/*; do
[ -e "${x}" ] && "${x}" "$@"
done
Roy's Projects / openresolv / blobdiff