Prevent service to start multiple times.

Added messages if trying to start/stop already started/stopped service.
Added daemon install instructions for ubuntu.

git-svn-id: svn+ssh://svn.code.sf.net/p/ddclient/code/trunk@193 3873ddee-7413-0410-b6c4-c2c57c1ab35a

README.md

@@ -74,6 +74,15 @@ INSTALLATION:
     ## start the first time by hand
     rc-service ddclient start
     
+    ## For those using Ubuntu style rc files and using daemon-mode:
+    cp sample-etc_rc.d_init.d_ddclient.ubuntu /etc/init.d/ddclient
+    ## enable automatic startup when booting
+    update-rc.d ddclient defaults
+    ## make sure you have perl installed 
+    apt-get install perl
+    ## start the first time by hand
+    service ddclient start
+
     ## If you are not using daemon-mode, configure cron and dhcp or ppp
     ## as described below.
 

sample-etc_rc.d_init.d_ddclient.ubuntu

@@ -20,6 +20,7 @@ test -f $CONF || exit 0
 
 case "$1" in
   start)
+      if [ ! -f $PIDFILE ]; then
         log_begin_msg "Starting ddclient..."
         DELAY=`grep -v '^\s*#' $CONF | grep -i -m 1 "daemon" | awk -F '=' '{print $2}'`
         if [ -z "$DELAY" ] ; then
@@ -29,6 +30,9 @@ case "$1" in
         fi
         start-stop-daemon -S -q -p $PIDFILE -x $DDCLIENT -- $DELAY
         log_end_msg $?
+      else
+        log_warning_msg "Service ddclient already running..."
+      fi
       ;;
   stop)
       if [ -f $PIDFILE ] ; then
@@ -36,6 +40,8 @@ case "$1" in
         start-stop-daemon -K -q -p $PIDFILE
         log_end_msg $?
         rm -f $PIDFILE
+      else
+        log_warning_msg "No ddclient running..."
       fi
       ;;
   restart|reload|force-reload)