/etc/resolvconf/update.d/pdns is in pdns-server 3.3-2.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 | #!/bin/sh
#
# Script to update PowerDNS recursor configuration fragment
#
# N.B. Resolvconf may run us even if pdns not running.
# If pdns is installed then we go ahead and update
# the pdns configuration file in case pdns is started later.
#
# Assumption: On entry, PWD contains the resolv.conf-type files
#
# Licensed under the GNU GPL. See /usr/share/common-licenses/GPL
#
# History:
# April 2005: Written by Jack Bates <ms419@freezone.co.uk> and
# Thomas Hood <jdthood@yahoo.co.uk>
set -e
PATH=/bin:/sbin
DEFAULT=/etc/default/pdns
[ -f $DEFAULT ] && . $DEFAULT
if [ -z "${RESOLVCONF_UPDATE_FORWARDERS:-}" ]; then
echo "Warning: \$RESOLVCONF_UPDATE_FORWARDERS not defined in $DEFAULT." >&2
echo " Pulling the emergency brake..." >&2
exit 0
fi
case $RESOLVCONF_UPDATE_FORWARDERS in
y*|Y*|1|on|On|true|True|TRUE) :;;
*)
echo "Not updating PowerDNS, disabled in $DEFAULT." >&2
exit 0
;;
esac
[ -x /usr/sbin/pdns_server ] || exit 0
[ -x /lib/resolvconf/list-records ] || exit 1
RUN_DIR=/var/run
CONF_FILE="$RUN_DIR/pdns.recursors"
TMP_FILE="${CONF_FILE}_new.$$"
# Get list of records, excluding our own
RSLVCNFFILES="$(/lib/resolvconf/list-records | sed -e '/^lo.pdns$/d')"
clean_up() { rm -f "$TMP_FILE" ; }
trap clean_up EXIT
clean_up
# Convert nameserver lines to recursor statements, without duplicates
if [ "$RSLVCNFFILES" ]; then
sed -n "
s/^nameserver[[:space:]]\+/recursor=/
# If no substitution (not a nameserver line) then skip line
T
# Append hold space (i.e., previous recursor statements) to pattern space
G
# If this line is a duplicate then skip line
/\(^.*\n\).*\1/d
# Disable 127.0.0.1 lines, can cause a dns loop.
/=127\./d
# Copy pattern space, including current line, to hold space
h
# Print current line
P
" $RSLVCNFFILES > "$TMP_FILE"
else
:> "$TMP_FILE"
fi
if [ "$1" = "-i" ]; then
mv -f "$TMP_FILE" "$CONF_FILE"
exit 0
fi
# Reload pdns unless we know its configuration file hasn't changed
if [ -x /usr/bin/diff ] && [ -f "$CONF_FILE" ] && /usr/bin/diff -q "$CONF_FILE" "$TMP_FILE" > /dev/null ; then
# No change
rm -f "$TMP_FILE"
else
mv -f "$TMP_FILE" "$CONF_FILE"
[ -x /etc/init.d/pdns ] && ps -C pdns_server > /dev/null && invoke-rc.d pdns reload || :
fi
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