main/djbdns: periodic script to update zone hints

This also splits the djbdns to djbdns-common that contains the
few utilities needed by the periodic script. Minor fix to init.d
script included also.

Signed-off-by: Timo Teras <timo.teras@iki.fi>
Signed-off-by: Natanael Copa <ncopa@alpinelinux.org>

1 files changed, 48 insertions, 0 deletions

diff --git a/main/djbdns/dnscache.monthly b/main/djbdns/dnscache.monthly
new file mode 100755
index 0000000000..0bd5a85397
--- /dev/null
+++ b/main/djbdns/dnscache.monthly
@@ -0,0 +1,48 @@
+#!/bin/sh
+
+if [ -f ./etc/conf.d/dnscache ]; then
+	. /etc/conf.d/dnscache
+fi
+
+if [ -z "$UPDATEHINTS" ]; then
+	exit 0
+fi
+
+cd /etc/dnscache/servers
+NEEDRESTART=
+ZONES=`ls /etc/dnscache/servers`
+for ZONEFILE in $ZONES; do
+	# Convert symlinks to copies, so we can update it
+	ZONE="$ZONEFILE"
+	if [ -L $ZONEFILE ]; then
+		DST="`readlink "$ZONEFILE"`"
+		cp -f "$DST" "$ZONEFILE"
+	fi
+
+	if [ "$ZONE" == "@" ]; then
+		ZONE="."
+	fi
+
+	if [ "$ZONE" != "." -o "$FORWARDONLY" = "" ]; then
+		TMPF=`mktemp -t`
+	
+		# Refresh zone info
+		dnsqr ns $ZONE | awk '/^answer: ./ { print $5 }' | sort -u | xargs dnsip > $TMPF
+
+		grep "^$" $TMPF 1> /dev/null
+		if [ $? != 0 ]; then
+			cmp -s $ZONEFILE $TMPF
+			if [ "$?" != 0 ]; then
+				NEEDRESTART=yes
+				cat $TMPF > $ZONEFILE
+			fi
+		fi
+		rm $TMPF
+	fi
+done
+
+if [ "$NEEDRESTART" ] && /etc/init.d/dnscache --quiet status; then
+	/etc/init.d/dnscache restart
+fi
+
+exit 0