Add uninstall confirm default input

shadowsocks-libev-debian.sh

@@ -164,8 +164,11 @@ function install(){
 # Uninstall Shadowsocks-libev
 function uninstall_shadowsocks_libev(){
     printf "Are you sure uninstall Shadowsocks-libev? (y/n) : "
-    read answer
     printf "\n"
+    read -p "(Default: n):" answer
+    if [ -z $answer ]; then
+        answer="n"
+    fi
     if [ "$answer" = "y" ]; then
         NODE_PID=`ps -ef | grep -v grep | grep -v ps | grep -i '/usr/local/bin/ss-server' | awk '{print $2}'`
         if [ ! -z $NODE_PID ]; then

shadowsocks-libev.sh

@@ -178,8 +178,11 @@ function install(){
 # Uninstall Shadowsocks-libev
 function uninstall_shadowsocks_libev(){
     printf "Are you sure uninstall shadowsocks_libev? (y/n) : "
-    read answer
     printf "\n"
+    read -p "(Default: n):" answer
+    if [ -z $answer ]; then
+        answer="n"
+    fi
     if [ "$answer" = "y" ]; then
         ps -ef | grep -v grep | grep -v ps | grep -i "ss-server" > /dev/null 2>&1
         if [ $? -eq 0 ]; then

shadowsocks-nodejs.sh

@@ -190,8 +190,11 @@ function install(){
 # Uninstall Shadowsocks-nodejs
 function uninstall_shadowsocks_nodejs(){
     printf "Are you sure uninstall Shadowsocks-nodejs? (y/n) : "
-    read answer
     printf "\n"
+    read -p "(Default: n):" answer
+    if [ -z $answer ]; then
+        answer="n"
+    fi
     if [ "$answer" = "y" ]; then
         NODE_PID=`ps -ef | grep -v grep | grep -v ps | grep -i '/usr/local/bin/ssserver' | awk '{print $2}'`
         if [ ! -z $NODE_PID ]; then

shadowsocks.sh

@@ -173,9 +173,12 @@ function install(){
 
 # Uninstall Shadowsocks
 function uninstall_shadowsocks(){
-    printf "Are you sure uninstall Shadowsocks? (y/n) : "
-    read answer
+    printf "Are you sure uninstall Shadowsocks? (y/n) "
     printf "\n"
+    read -p "(Default: n):" answer
+    if [ -z $answer ]; then
+        answer="n"
+    fi
     if [ "$answer" = "y" ]; then
         NODE_PID=`ps -ef | grep -v grep | grep -v ps | grep -i '/usr/bin/python /usr/bin/ssserver' | awk '{print $2}'`
         if [ ! -z $NODE_PID ]; then