From b5da071a06041527f6d47580f7c9ecd3de97a2a9 Mon Sep 17 00:00:00 2001
From: Stefan Huber <shuber2@gmx.at>
Date: Mon, 29 Oct 2012 12:16:11 +0100
Subject: [PATCH] nsd-dynipwatch: --watchfile, let inotifywatch die

---
 init.d/nsd-dynipwatch |  3 +--
 nsd-dynipwatch        | 14 ++++++++++----
 2 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/init.d/nsd-dynipwatch b/init.d/nsd-dynipwatch
index 9696359..d7563da 100755
--- a/init.d/nsd-dynipwatch
+++ b/init.d/nsd-dynipwatch
@@ -16,8 +16,7 @@
 . /lib/lsb/init-functions
 
 PIDFILE=/var/run/nsd-dynipwatch.pid
-IPFILE=/tmp/euklid.ip
-ARGS="/etc/nsd3/sthu.org.zone euklid ${IPFILE}"
+ARGS="/etc/nsd3/sthu.org.zone euklid"
 
 case "$1" in
 start)
diff --git a/nsd-dynipwatch b/nsd-dynipwatch
index a002f95..bfdb840 100755
--- a/nsd-dynipwatch
+++ b/nsd-dynipwatch
@@ -1,12 +1,14 @@
 #!/bin/bash
 
 logfile=
+watchfile=
 
 while true; do
 	case $1 in
 		--log) logfile=$2; shift ;;
+		--watchfile) watchfile=$2; shift ;;
 		-h|--help)
-			echo "$0 [-f] [--log logfile] zonefile host watchfile"
+			echo "$0 [--log logfile] [--watchfile /tmp/\${host}.ip] zonefile host"
 			exit 0
 			;;
 		*) break ;;
@@ -17,11 +19,11 @@ done
 
 zonefile=$1
 host=$2
-watchfile=$3
+[ -z "${watchfile}" ] && watchfile=/tmp/${host}.ip
 [ -z "${logfile}" ] && logfile="/var/log/nsd-dynipwatch-${host}.log"
 
-echo "logfile: ${logfile}"
 
+echo "Watch ${watchfile} for host ${host} and update ${zonefile}. Logfile: ${logfile}"
 
 
 function getAddrFromZonefile # <host> <zonefile>
@@ -47,7 +49,10 @@ function setSerialInZonefile # <zonefile> <serial>
 function run()
 {
 	while true; do
-		inotifywait -q -e close_write "${watchfile}"  > /dev/null
+		inotifywait -q -t 30 -e close_write "${watchfile}"  > /dev/null
+		ret=$?
+		[ "$ret" = "0" ] || continue
+
 		oldip=`getAddrFromZonefile "${host}" "${zonefile}"`
 		newip=`cat ${watchfile}`
 		echo "`date '+%a %F %T'` :: ${oldip} => ${newip}."
@@ -68,5 +73,6 @@ function run()
 	done
 }
 
+
 run >> $logfile
 
-- 
2.39.5