ACC SHELL
#!/bin/bash
#
# Copyright (c) 2008 SUSE LINUX Products GmbH, Nuernberg, Germany.
# This program is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free Software
# Foundation; either version 2 of the License, or (at your option) any later
# version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
# details.
#
# You should have received a copy of the GNU General Public License along with
# this program; if not, write to the Free Software Foundation, Inc., 59 Temple
# Place, Suite 330, Boston, MA 02111-1307 USA
#
# Author: Michael Calmer <mc@suse.de>
# Marius Tomaschewski <mt@suse.de>
#
##
unset POSIXLY_CORRECT ; set +o posix # we're using non-posix bash features
if test "$UID" != "0" -a "$USER" != root -a -z "$ROOT" ; then
echo "You must be root to start $0." >&2
exit 1
fi
# The environment variable ROOT indicates the root of the system to be
# managed by SuSEconfig when that root is not '/'
r="$ROOT"
. "$r/etc/sysconfig/network/scripts/functions.netconfig"
PROGNAME="${0##*/}"
STATEDIR="$r/var/run/netconfig"
debug "$PROGNAME module called"
. "$r/etc/sysconfig/network/config"
unset DNS_SEARCHLIST ${!DNS_SEARCHLIST_*}
unset DNS_SERVERS ${!DNS_SERVERS_*}
DESTFILE="$r/etc/resolv.conf"
TMP_FILE=""
# *********************
# FUNCTIONS
# *********************
function write_resolv_conf()
{
#
# empty search list is a valid value
#
#test -z "$1" && return 1
#
# empty nameserver is a valid value too
# (empty at least in the forwarder mode)
#
#test -z "$2" && return 1
debug "write_resolv_conf: '$1' '$2'"
local SEARCHLIST=()
local NAMESERVER=()
# DESTFILE may be a symlink on a read only /-fs
DST_FILE=`read_symlink "${DESTFILE}"`
TMP_FILE=`mktemp "${DST_FILE}.XXXXXX" 2>/dev/null || \
mktemp -t "${DST_FILE##*/}.XXXXXX"` || return 1
if test ! -s "$DST_FILE" ; then
touch "$DST_FILE" ; chmod 644 "$DST_FILE"
fi
# * copy dest => tmp to get the file attributes
# * remove the content
# * print a warning on top of this file
#cp -p "$DST_FILE" "$TMP_FILE"
# set explicit mode on tmp file instead to preserve the
# mode of original file that can be wrong (bnc#428458)
chmod 644 "$TMP_FILE"
cat << EOT > "$TMP_FILE"
### $DESTFILE file autogenerated by netconfig!
#
# Before you change this file manually, consider to define the
# static DNS configuration using the following variables in the
# /etc/sysconfig/network/config file:
# NETCONFIG_DNS_STATIC_SEARCHLIST
# NETCONFIG_DNS_STATIC_SERVERS
# NETCONFIG_DNS_FORWARDER
# or disable DNS configuration updates via netconfig by setting:
# NETCONFIG_DNS_POLICY=''
#
# See also the netconfig(8) manual page and other documentation.
#
# Note: Manual change of this file disables netconfig too, but
# may get lost when this file contains comments or empty lines
# only, the netconfig settings are same with settings in this
# file and in case of a "netconfig update -f" call.
#
### Please remove (at least) this line when you modify the file!
EOT
for nd in $1; do
# skip duplicates
for od in ${SEARCHLIST[@]} ; do
[ "x$nd" == "x$od" ] && continue 2
done
# resolv.conf supports up to 6 domains
[ ${#SEARCHLIST[@]} -lt 6 ] || break
SEARCHLIST=(${SEARCHLIST[@]} ${nd})
done
if [ ${#SEARCHLIST[@]} -gt 0 ]; then
{
echo "search ${SEARCHLIST[@]}"
} >> "$TMP_FILE"
fi
for ns in $2; do
# skip duplicates
for os in ${NAMESERVER[@]} ; do
[ "x$ns" == "x$os" ] && continue 2
done
# resolv.conf supports up to 3 nameserver
[ ${#NAMESERVER[@]} -lt 3 ] || break
NAMESERVER=(${NAMESERVER[@]} ${ns})
done
if [ ${#NAMESERVER[@]} -gt 0 ]; then
{
for ns in ${NAMESERVER[@]}; do
echo "nameserver $ns"
done
} >> "$TMP_FILE"
fi
netconfig_check_md5_and_move "$TMP_FILE" "$DESTFILE" ".netconfig" TMP_FILE
return $?
}
function get_dns_settings()
{
local cfg=$1 ; shift
test "x$cfg" = x && return 1
local SERVICE DNSSEARCH DNSDOMAIN DNSSERVERS
local var idx DNS_SEARCHLIST DNS_SERVERS
debug "exec get_dns_settings: $cfg"
get_variable "SERVICE" "$cfg"
idx=`get_ranking_idx "$SERVICE" "$@"`
debug " get_dns_settings: service '$SERVICE' => rank '$idx'"
var="DNS_SEARCHLIST_$idx"
DNS_SEARCHLIST=(${!var})
get_variable "DNSSEARCH" "$cfg"
if [ "x$DNSSEARCH" != "x" ]; then
DNS_SEARCHLIST=(${DNS_SEARCHLIST[@]} $DNSSEARCH)
else
get_variable "DNSDOMAIN" "$cfg"
if [ "x$DNSDOMAIN" != "x" ]; then
DNS_SEARCHLIST=(${DNS_SEARCHLIST[@]} $DNSDOMAIN)
fi
fi
unset DNSSEARCH DNSDOMAIN
eval "${var}='${DNS_SEARCHLIST[@]}'"
debug " get_dns_settings: ${var}='${!var}'"
var="DNS_SERVERS_$idx"
DNS_SERVERS=(${!var})
get_variable "DNSSERVERS" "$cfg"
if [ "x$DNSSERVERS" != "x" ]; then
DNS_SERVERS=(${DNS_SERVERS[@]} $DNSSERVERS)
fi
unset DNSSERVERS
eval "${var}='${DNS_SERVERS[@]}'"
debug " get_dns_settings: ${var}='${!var}'"
debug "exit get_dns_settings: $cfg"
return 0
}
function manage_interfaceconfig()
{
local cfg dir="$1" ; shift
test "x$dir" != x -a -d "$dir" || return 1
debug "exec manage_interfaceconfig: $dir"
for cfg in `ls -X -r "$dir/" 2>/dev/null`; do
get_dns_settings "$dir/$cfg" "$@"
done
debug "exit manage_interfaceconfig: $dir"
return 0
}
# *********************
# EXECUTION STARTS HERE
# *********************
# just for the case we need the original value...
_NETCONFIG_DNS_RANKING="$NETCONFIG_DNS_RANKING"
case "$_NETCONFIG_DNS_RANKING" in
auto) _NETCONFIG_DNS_RANKING="$NETCONFIG_DNS_RANKING_DEFAULT" ;;
none) _NETCONFIG_DNS_RANKING="" ;;
esac
# just for the case we need the original value...
_NETCONFIG_DNS_POLICY="$NETCONFIG_DNS_POLICY"
if [ "x$_NETCONFIG_DNS_POLICY" = "xauto" ]; then
if [ "x$NETWORKMANAGER" = "xyes" ] ; then
#
# Use NetworkManager policy merged data
#
_NETCONFIG_DNS_POLICY='STATIC_FALLBACK NetworkManager'
else
#
# We use static settings and extend them
# with interface specific if available
#
_NETCONFIG_DNS_POLICY='STATIC *'
fi
elif [ "x$_NETCONFIG_DNS_POLICY" = "x" ]; then
#
# empty policy means do not touch anything.
# successful exit.
#
exit 0;
fi
sf=0
_g=1
# disable filename glob expansion if needed
shopt -o -q noglob || _g=0
[ $_g ] && shopt -o -s noglob
for POL in $_NETCONFIG_DNS_POLICY; do
shopt -o -u noglob
case "$POL" in
(NetworkManager)
if [ "x$NETWORKMANAGER" = "xyes" ] ; then
debug "Use NetworkManager policy merged settings"
cfg="$STATEDIR/NetworkManager.netconfig"
if [ -r "$cfg" ] ; then
get_dns_settings "$cfg" "$_NETCONFIG_DNS_RANKING"
fi
break
fi
;;
(STATIC)
debug "Keep Static"
DNS_SEARCHLIST_1="$DNS_SEARCHLIST_1 $NETCONFIG_DNS_STATIC_SEARCHLIST"
DNS_SERVERS_1="$DNS_SERVERS_1 $NETCONFIG_DNS_STATIC_SERVERS"
;;
(STATIC_FALLBACK)
debug "Static Fallback"
sf=1
;;
(*)
debug "Other: $POL"
for IFDIR in $STATEDIR/$POL; do
test -d "$IFDIR" -a \
-d "/sys/class/net/${IFDIR##*/}" || continue
# proceed every interface we find with this match
manage_interfaceconfig "$IFDIR" "$_NETCONFIG_DNS_RANKING"
done
;;
esac
done
[ $_g ] && shopt -o -u noglob
if [ $sf -eq 1 -a -z "$DNS_SEARCHLIST_0" \
-a -z "$DNS_SEARCHLIST_1" ] ; then
DNS_SEARCHLIST_2="$DNS_SEARCHLIST_2 $NETCONFIG_DNS_STATIC_SEARCHLIST"
fi
if [ $sf -eq 1 -a -z "$DNS_SERVERS_0" \
-a -z "$DNS_SERVERS_1" ] ; then
DNS_SERVERS_2="$DNS_SERVERS_2 $NETCONFIG_DNS_STATIC_SERVERS"
fi
# check if a nameserver module is used.
# If yes, don't write nameserver. glibc is using
# the name server on the local machine then ...
if [ "$NETCONFIG_DNS_FORWARDER" != "resolver" -a \
"$NETCONFIG_DNS_FORWARDER" != "" ]; then
# write explicitly specified loopback addresses (when any);
# everything else will go into the forwarder specific config.
lns=()
rns_0=""
rns_1=""
rns_2=""
for idx in 0 1 2 ; do
var="DNS_SERVERS_$idx"
val=(${!var})
rns=()
for ns in ${val[*]} ; do
case $ns in
127.*|::1) lns+=("$ns") ;;
*) rns+=("$ns") ;;
esac
done
unset $var
eval "rns_$idx='${rns[*]}'"
done
# fallback requires a localhost address, set when needed
if test "$NETCONFIG_DNS_FORWARDER_FALLBACK" = yes ;
then
test ${#lns[@]} -le 0 && lns=(127.0.0.1)
fi
# apply localhost addresses + fallback name servers
if test ${#lns[@]} -gt 0 ; then
# local addresses have top prioriry in forwarder modes
DNS_SERVERS_0="${lns[*]} $rns_0"
DNS_SERVERS_1="$rns_1"
DNS_SERVERS_2="$rns_2"
fi
fi
write_resolv_conf "$DNS_SEARCHLIST_0 $DNS_SEARCHLIST_1 $DNS_SEARCHLIST_2" \
"$DNS_SERVERS_0 $DNS_SERVERS_1 $DNS_SERVERS_2"
RET=$?
if [ $RET -eq 1 ]; then
# nothing changed; we are finished
exit 0
elif [ $RET -eq 2 ]; then
# user modified the config. Copy aborted
echo "ATTENTION: You have modified $DESTFILE. Leaving it untouched..."
echo "You can find my version in $TMP_FILE ..."
exit 20
fi
# here we should restart services if needed
exit 0;
# vim: set ts=8 sts=4 sw=4 ai et:
ACC SHELL 2018