diff --git a/shadowsocks b/shadowsocks
index dd37f40..ab00103 100644
--- a/shadowsocks
+++ b/shadowsocks
@@ -14,12 +14,12 @@
 
 # Author: Teddysun <i@teddysun.com>
 
-if [ -f /usr/bin/ssserver ]; then
-    BIN=/usr/bin/ssserver
-elif [ -f /usr/local/bin/ssserver ]; then
-    BIN=/usr/local/bin/ssserver
-fi
 NAME=Shadowsocks
+if [ -f /usr/bin/ssserver ]; then
+    DAEMON=/usr/bin/ssserver
+elif [ -f /usr/local/bin/ssserver ]; then
+    DAEMON=/usr/local/bin/ssserver
+fi
 if [ -f /etc/shadowsocks-python/config.json ]; then
     CONF=/etc/shadowsocks-python/config.json
 elif [ -f /etc/shadowsocks.json ]; then
@@ -28,7 +28,7 @@ fi
 RETVAL=0
 
 check_running(){
-    PID=$(ps -ef | grep -v grep | grep -i "${BIN}" | awk '{print $2}')
+    PID=$(ps -ef | grep -v grep | grep -i "${DAEMON}" | awk '{print $2}')
     if [ -n "$PID" ]; then
         return 0
     else
@@ -42,7 +42,7 @@ do_start(){
         echo "$NAME (pid $PID) is already running..."
         exit 0
     else
-        $BIN -c $CONF -d start
+        $DAEMON -c $CONF -d start
         RETVAL=$?
         if [ $RETVAL -eq 0 ]; then
             echo "Starting $NAME success"
@@ -55,7 +55,7 @@ do_start(){
 do_stop(){
     check_running
     if [ $? -eq 0 ]; then
-        $BIN -c $CONF -d stop
+        $DAEMON -c $CONF -d stop
         RETVAL=$?
         if [ $RETVAL -eq 0 ]; then
             echo "Stopping $NAME success"
diff --git a/shadowsocks-debian b/shadowsocks-debian
index d5dbbde..b0fe0c0 100644
--- a/shadowsocks-debian
+++ b/shadowsocks-debian
@@ -12,12 +12,12 @@
 
 # Author: Teddysun <i@teddysun.com>
 
-if [ -f /usr/bin/ssserver ]; then
-    BIN=/usr/bin/ssserver
-elif [ -f /usr/local/bin/ssserver ]; then
-    BIN=/usr/local/bin/ssserver
-fi
 NAME=Shadowsocks
+if [ -f /usr/bin/ssserver ]; then
+    DAEMON=/usr/bin/ssserver
+elif [ -f /usr/local/bin/ssserver ]; then
+    DAEMON=/usr/local/bin/ssserver
+fi
 if [ -f /etc/shadowsocks-python/config.json ]; then
     CONF=/etc/shadowsocks-python/config.json
 elif [ -f /etc/shadowsocks.json ]; then
@@ -26,7 +26,7 @@ fi
 RETVAL=0
 
 check_running(){
-    PID=$(ps -ef | grep -v grep | grep -i "${BIN}" | awk '{print $2}')
+    PID=$(ps -ef | grep -v grep | grep -i "${DAEMON}" | awk '{print $2}')
     if [ -n "$PID" ]; then
         return 0
     else
@@ -40,7 +40,7 @@ do_start(){
         echo "$NAME (pid $PID) is already running..."
         exit 0
     else
-        $BIN -c $CONF -d start
+        $DAEMON -c $CONF -d start
         RETVAL=$?
         if [ $RETVAL -eq 0 ]; then
             echo "Starting $NAME success"
@@ -53,7 +53,7 @@ do_start(){
 do_stop(){
     check_running
     if [ $? -eq 0 ]; then
-        $BIN -c $CONF -d stop
+        $DAEMON -c $CONF -d stop
         RETVAL=$?
         if [ $RETVAL -eq 0 ]; then
             echo "Stopping $NAME success"
diff --git a/shadowsocks-go b/shadowsocks-go
index 9c391f0..368a9e9 100644
--- a/shadowsocks-go
+++ b/shadowsocks-go
@@ -21,7 +21,7 @@
 [ ${NETWORKING} ="yes" ] || exit 0
 
 NAME=Shadowsocks-go
-BIN=/usr/bin/shadowsocks-server
+DAEMON=/usr/bin/shadowsocks-server
 if [ -f /etc/shadowsocks-go/config.json ]; then
     CONF=/etc/shadowsocks-go/config.json
 elif [ -f /etc/shadowsocks/config.json ]; then
@@ -31,19 +31,19 @@ PID_DIR=/var/run
 PID_FILE=$PID_DIR/shadowsocks-go.pid
 RET_VAL=0
 
-[ -x $BIN ] || exit 0
+[ -x $DAEMON ] || exit 0
 
 if [ ! -d $PID_DIR ]; then
     mkdir -p $PID_DIR
     if [ $? -ne 0 ]; then
         echo "Creating PID directory $PID_DIR failed"
-        exit 1
+        RET_VAL=1
     fi
 fi
 
 if [ ! -f $CONF ]; then
     echo "$NAME config file $CONF not found"
-    exit 1
+    RET_VAL=1
 fi
 
 check_running() {
@@ -78,7 +78,7 @@ do_start() {
         echo "$NAME (pid $PID) is already running..."
         return 0
     fi
-    $BIN -c $CONF 2>&1 > /dev/null &
+    $DAEMON -c $CONF 2>&1 > /dev/null &
     PID=$!
     echo $PID > $PID_FILE
     sleep 0.3
diff --git a/shadowsocks-go-debian b/shadowsocks-go-debian
index f45da70..18826fe 100644
--- a/shadowsocks-go-debian
+++ b/shadowsocks-go-debian
@@ -13,7 +13,7 @@
 # Author: Teddysun <i@teddysun.com>
 
 NAME=Shadowsocks-go
-BIN=/usr/bin/shadowsocks-server
+DAEMON=/usr/bin/shadowsocks-server
 if [ -f /etc/shadowsocks-go/config.json ]; then
     CONF=/etc/shadowsocks-go/config.json
 elif [ -f /etc/shadowsocks/config.json ]; then
@@ -23,19 +23,19 @@ PID_DIR=/var/run
 PID_FILE=$PID_DIR/shadowsocks-go.pid
 RET_VAL=0
 
-[ -x $BIN ] || exit 0
+[ -x $DAEMON ] || exit 0
 
 if [ ! -d $PID_DIR ]; then
     mkdir -p $PID_DIR
     if [ $? -ne 0 ]; then
         echo "Creating PID directory $PID_DIR failed"
-        exit 1
+        RET_VAL=1
     fi
 fi
 
 if [ ! -f $CONF ]; then
     echo "$NAME config file $CONF not found"
-    exit 1
+    RET_VAL=1
 fi
 
 check_running() {
@@ -70,7 +70,7 @@ do_start() {
         echo "$NAME (pid $PID) is already running..."
         return 0
     fi
-    $BIN -c $CONF 2>&1 > /dev/null &
+    $DAEMON -c $CONF 2>&1 > /dev/null &
     PID=$!
     echo $PID > $PID_FILE
     sleep 0.3
diff --git a/shadowsocks-libev b/shadowsocks-libev
index 220eb15..d642560 100644
--- a/shadowsocks-libev
+++ b/shadowsocks-libev
@@ -30,13 +30,13 @@ if [ ! -d $PID_DIR ]; then
     mkdir -p $PID_DIR
     if [ $? -ne 0 ]; then
         echo "Creating PID directory $PID_DIR failed"
-        exit 1
+        RET_VAL=1
     fi
 fi
 
 if [ ! -f $CONF ]; then
     echo "$NAME config file $CONF not found"
-    exit 1
+    RET_VAL=1
 fi
 
 check_running() {
diff --git a/shadowsocks-libev-debian b/shadowsocks-libev-debian
index f6360f8..6be74a9 100644
--- a/shadowsocks-libev-debian
+++ b/shadowsocks-libev-debian
@@ -29,13 +29,13 @@ if [ ! -d $PID_DIR ]; then
     mkdir -p $PID_DIR
     if [ $? -ne 0 ]; then
         echo "Creating PID directory $PID_DIR failed"
-        exit 1
+        RET_VAL=1
     fi
 fi
 
 if [ ! -f $CONF ]; then
     echo "$NAME config file $CONF not found"
-    exit 1
+    RET_VAL=1
 fi
 
 check_running() {
diff --git a/shadowsocksR b/shadowsocksR
index bf148ae..88420d5 100644
--- a/shadowsocksR
+++ b/shadowsocksR
@@ -15,7 +15,7 @@
 # Author: Teddysun <i@teddysun.com>
 
 NAME=ShadowsocksR
-BIN=/usr/local/shadowsocks/server.py
+DAEMON=/usr/local/shadowsocks/server.py
 if [ -f /etc/shadowsocks-r/config.json ]; then
     CONF=/etc/shadowsocks-r/config.json
 elif [ -f /etc/shadowsocks.json ]; then
@@ -24,7 +24,7 @@ fi
 RETVAL=0
 
 check_running(){
-    PID=$(ps -ef | grep -v grep | grep -i "${BIN}" | awk '{print $2}')
+    PID=$(ps -ef | grep -v grep | grep -i "${DAEMON}" | awk '{print $2}')
     if [ -n "$PID" ]; then
         return 0
     else
@@ -38,7 +38,7 @@ do_start(){
         echo "$NAME (pid $PID) is already running..."
         exit 0
     else
-        $BIN -c $CONF -d start
+        $DAEMON -c $CONF -d start
         RETVAL=$?
         if [ $RETVAL -eq 0 ]; then
             echo "Starting $NAME success"
@@ -51,7 +51,7 @@ do_start(){
 do_stop(){
     check_running
     if [ $? -eq 0 ]; then
-        $BIN -c $CONF -d stop
+        $DAEMON -c $CONF -d stop
         RETVAL=$?
         if [ $RETVAL -eq 0 ]; then
             echo "Stopping $NAME success"
diff --git a/shadowsocksR-debian b/shadowsocksR-debian
index 7327546..adb2b76 100644
--- a/shadowsocksR-debian
+++ b/shadowsocksR-debian
@@ -13,7 +13,7 @@
 # Author: Teddysun <i@teddysun.com>
 
 NAME=ShadowsocksR
-BIN=/usr/local/shadowsocks/server.py
+DAEMON=/usr/local/shadowsocks/server.py
 if [ -f /etc/shadowsocks-r/config.json ]; then
     CONF=/etc/shadowsocks-r/config.json
 elif [ -f /etc/shadowsocks.json ]; then
@@ -22,7 +22,7 @@ fi
 RETVAL=0
 
 check_running(){
-    PID=$(ps -ef | grep -v grep | grep -i "${BIN}" | awk '{print $2}')
+    PID=$(ps -ef | grep -v grep | grep -i "${DAEMON}" | awk '{print $2}')
     if [ -n "$PID" ]; then
         return 0
     else
@@ -36,7 +36,7 @@ do_start(){
         echo "$NAME (pid $PID) is already running..."
         exit 0
     else
-        $BIN -c $CONF -d start
+        $DAEMON -c $CONF -d start
         RETVAL=$?
         if [ $RETVAL -eq 0 ]; then
             echo "Starting $NAME success"
@@ -49,7 +49,7 @@ do_start(){
 do_stop(){
     check_running
     if [ $? -eq 0 ]; then
-        $BIN -c $CONF -d stop
+        $DAEMON -c $CONF -d stop
         RETVAL=$?
         if [ $RETVAL -eq 0 ]; then
             echo "Stopping $NAME success"