diff --git a/shadowsocks-libev b/shadowsocks-libev
index 0827604..dd9a025 100644
--- a/shadowsocks-libev
+++ b/shadowsocks-libev
@@ -1,123 +1,97 @@
 #!/bin/bash
-#
-# Script to run Shadowsocks in daemon mode at boot time.
-# Revision 1.0 
-#====================================================================
-# Run level information:
-# chkconfig: 2345 99 99
-# Description: lightweight secured socks5 proxy
-# processname: ss-server
-# Author: Teddysun <i@teddysun.com>
-# Run "/sbin/chkconfig --add shadowsocks" to add the Run levels.
-#====================================================================
 
-#====================================================================
-# Paths and variables and system checks.
+### BEGIN INIT INFO
+# chkconfig:         2345 90 10
+# Provides:          Shadowsocks-libev
+# Required-Start:    $network $syslog
+# Required-Stop:     $network
+# Default-Start:     2 3 4 5
+# Default-Stop:      0 1 6
+# Short-Description: Fast tunnel proxy that helps you bypass firewalls
+# Description:       A secure socks5 proxy, designed to protect your Internet traffic.
+### END INIT INFO
+
+# Author: Teddysun <i@teddysun.com>
 
 # Source function library
 . /etc/rc.d/init.d/functions
 
 # Check that networking is up.
-#
 [ ${NETWORKING} ="yes" ] || exit 0
 
-# Daemon
-NAME=shadowsocks-server
-DAEMON=/usr/local/bin/ss-server
-
-# Path to the configuration file.
-#
+if [ -f /usr/local/bin/ss-server ]; then
+    DAEMON=/usr/local/bin/ss-server
+elif [ -f /usr/bin/ss-server ]; then
+    DAEMON=/usr/bin/ss-server
+fi
+NAME=Shadowsocks-libev
 CONF=/etc/shadowsocks-libev/config.json
+PID_DIR=/var/run
+PID_FILE=$PID_DIR/shadowsocks-libev.pid
+RET_VAL=0
 
-#USER="nobody"
-#GROUP="nobody"
+[ -x $DAEMON ] || exit 0
 
-# Take care of pidfile permissions
-mkdir /var/run/$NAME 2>/dev/null || true
-#chown "$USER:$GROUP" /var/run/$NAME
-
-# Check the configuration file exists.
-#
-if [ ! -f $CONF ] ; then
-echo "The configuration file cannot be found!"
-exit 0
+if [ ! -d $PID_DIR ]; then
+    mkdir -p $PID_DIR
+    if [ $? -ne 0 ]; then
+        echo "Creating PID directory $PID_DIR failed"
+        exit 1
+    fi
 fi
 
-# Path to the lock file.
-#
-LOCK_FILE=/var/lock/subsys/shadowsocks
-
-# Path to the pid file.
-#
-PID=/var/run/$NAME/pid
-
-
-#====================================================================
-
-#====================================================================
-# Run controls:
-
-RETVAL=0
-
-# Start shadowsocks as daemon.
-#
-start() {
-if [ -f $LOCK_FILE ]; then
-echo "$NAME is already running!"
-exit 0
-else
-echo -n $"Starting ${NAME}: "
-#daemon --check $DAEMON --user $USER "$DAEMON -f $PID -c $CONF > /dev/null"
-daemon $DAEMON -u -c $CONF -f $PID
+if [ ! -f $CONF ]; then
+    echo "$NAME config file $CONF not found"
+    exit 1
 fi
 
-RETVAL=$?
-[ $RETVAL -eq 0 ] && success
-echo
-[ $RETVAL -eq 0 ] && touch $LOCK_FILE
-return $RETVAL
+do_start() {
+    if [ -f $PID_FILE ]; then
+        read PID < $PID_FILE
+        echo "$NAME (pid $PID) is already running..."
+        exit 0
+    else
+        echo -n $"Starting ${NAME}: "
+        daemon $DAEMON -u -c $CONF -f $PID_FILE
+    fi
+
+    RETVAL=$?
+    [ $RETVAL -eq 0 ] && success
+    echo
 }
 
-
-# Stop shadowsocks.
-#
-stop() {
-echo -n $"Shutting down ${NAME}: "
-killproc -p ${PID}
-RETVAL=$?
-[ $RETVAL -eq 0 ]
-rm -f $LOCK_FILE
-rm -f ${PID}
-echo
-return $RETVAL
+do_stop() {
+    echo -n $"Stopping ${NAME}: "
+    killproc -p $PID_FILE
+    RETVAL=$?
+    [ $RETVAL -eq 0 ]
+    rm -f $PID_FILE
+    echo
+}
+
+do_status() {
+    if [ -f $PID_FILE ]; then
+        read PID < $PID_FILE
+        echo "$NAME (pid $PID) is running..."
+    else
+        echo "$NAME is stopped"
+        RETVAL=1
+    fi
+}
+
+do_restart() {
+    do_stop
+    do_start
 }
 
-# See how we were called.
 case "$1" in
-start)
-start
-;;
-stop)
-stop
-;;
-restart)
-stop
-start
-;;
-condrestart)
-if [ -f $LOCK_FILE ]; then
-stop
-start
-RETVAL=$?
-fi
-;;
-status)
-status $DAEMON
-RETVAL=$?
-;;
-*)
-echo $"Usage: $0 {start|stop|restart|condrestart|status}"
-RETVAL=1
+    start|stop|restart|status)
+    do_$1
+    ;;
+    *)
+    echo "Usage: $0 { start | stop | restart | status }"
+    RET_VAL=1
+    ;;
 esac
 
 exit $RETVAL