/lib/resolvconf/named is in openresolv 3.8.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# Copyright (c) 2007-2016 Roy Marples
# All rights reserved
# named 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 "/etc"/resolvconf.conf ] || exit 0
. "/etc/resolvconf.conf" || exit 1
[ -z "$named_zones" -a -z "$named_options" ] && exit 0
[ -z "$RESOLVCONF" ] && eval "$(/sbin/resolvconf -v)"
NL="
"
# Platform specific kludges
if [ -z "$named_service" -a -z "$named_restart" -a \
-d "$RCDIR" -a ! -x "$RCDIR"/named ]
then
if [ -x "$RCDIR"/bind9 ]; then
# Debian and derivatives
named_service=bind9
elif [ -x "$RCDIR"/rc.bind ]; then
# Slackware
named_service=rc.bind
fi
fi
: ${named_service:=named}
: ${named_pid:=/var/run/$named_service.pid}
[ -s "$named_pid" ] || named_pid=/var/run/$named_service/$named_service.pid
[ -s "$named_pid" ] || unset named_pid
newoptions="# Generated by resolvconf$NL"
newzones="$newoptions"
forward=
for n in $NAMESERVERS; do
case "$forward" in
*"$NL $n;"*);;
*) forward="$forward$NL $n;";;
esac
done
if [ -n "$forward" ]; then
newoptions="${newoptions}forward first;${NL}forwarders {$forward${NL}};$NL"
fi
for d in $DOMAINS; do
newzones="${newzones}zone \"${d%%:*}\" {$NL"
newzones="$newzones type forward;$NL"
newzones="$newzones forward first;$NL forwarders {$NL"
ns="${d#*:}"
while [ -n "$ns" ]; do
newzones="$newzones ${ns%%,*};$NL"
[ "$ns" = "${ns#*,}" ] && break
ns="${ns#*,}"
done
newzones="$newzones };$NL};$NL"
done
# Try to ensure that config dirs exist
if type config_mkdirs >/dev/null 2>&1; then
config_mkdirs "$named_options" "$named_zones"
else
/sbin/resolvconf -D "$named_options" "$named_zones"
fi
# No point in changing files or reloading bind if the end result has not
# changed
changed=false
if [ -n "$named_options" ]; then
if [ ! -f "$named_options" ] || \
[ "$(cat "$named_options")" != "$(printf %s "$newoptions")" ]
then
printf %s "$newoptions" >"$named_options"
changed=true
fi
fi
if [ -n "$named_zones" ]; then
if [ ! -f "$named_zones" ] || \
[ "$(cat "$named_zones")" != "$(printf %s "$newzones")" ]
then
printf %s "$newzones" >"$named_zones"
changed=true
fi
fi
# named does not seem to work with SIGHUP which is a same
if $changed; then
if [ -n "$named_restart" ]; then
eval $named_restart
elif [ -n "$RESTARTCMD" ]; then
set -- ${named_service}
eval $RESTARTCMD
else
/sbin/resolvconf -r ${named_service}
fi
fi
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