Merge pull request #46 from everett-toews/whitelist

Whitelist players

minecraft-server/README.md

@@ -170,6 +170,14 @@ Valid values are: `peaceful`, `easy`, `normal`, and `hard`, and an
 error message will be output in the logs if it's not one of these
 values.
 
+### Whitelist Players
+
+To whitelist players for your Minecraft server, pass the Minecraft usernames separated by commas via the `WHITELIST` environment variable, such as
+
+	docker run -d -e WHITELIST=user1,user2 ...
+
+If the `WHITELIST` environment variable is not used, any user can join your Minecraft server if it's publicly accessible.
+
 ### Op/Administrator Players
 
 To add more "op" (aka adminstrator) users to your Minecraft server, pass the Minecraft usernames separated by commas via the `OPS` environment variable, such as
@@ -233,7 +241,7 @@ be configured by setting `LEVEL_TYPE` to
 Descriptions are available at the [gamepedia](http://minecraft.gamepedia.com/Server.properties).
 
 When using a level type of `FLAT` and `CUSTOMIZED`, you can further configure the world generator
-by passing [custom generator settings](http://minecraft.gamepedia.com/Superflat). 
+by passing [custom generator settings](http://minecraft.gamepedia.com/Superflat).
 **Since generator settings usually have ;'s in them, surround the -e value with a single quote, like below.**
 
 For example (just the `-e` bits):

minecraft-server/start-minecraft.sh

@@ -58,7 +58,7 @@ case $TYPE in
   	  RECOMMENDED)
   		FORGE_VERSION=`wget -O - http://files.minecraftforge.net/maven/net/minecraftforge/forge/promotions_slim.json | jsawk -n "out(this.promos['$norm-recommended'])"`
   	  ;;
-  
+
   	  *)
   		FORGE_VERSION=$FORGEVERSION
   	  ;;
@@ -89,6 +89,10 @@ esac
 if [ ! -e server.properties ]; then
   cp /tmp/server.properties .
 
+  if [ -n "$WHITELIST" ]; then
+    sed -i "/whitelist\s*=/ c whitelist=true" /data/server.properties
+  fi
+
   if [ -n "$MOTD" ]; then
     sed -i "/motd\s*=/ c motd=$MOTD" /data/server.properties
   fi
@@ -171,6 +175,10 @@ if [ -n "$OPS" -a ! -e ops.txt.converted ]; then
   echo $OPS | awk -v RS=, '{print}' >> ops.txt
 fi
 
+if [ -n "$WHITELIST" -a ! -e white-list.txt.converted ]; then
+  echo $WHITELIST | awk -v RS=, '{print}' >> white-list.txt
+fi
+
 if [ -n "$ICON" -a ! -e server-icon.png ]; then
   echo "Using server icon from $ICON..."
   # Not sure what it is yet...call it "img"