added "--background" options

Author: mick-whats

lib/open.js

@@ -27,11 +27,15 @@ function open(target, appName, callback) {
 
   switch (process.platform) {
   case 'darwin':
-    if (appName) {
-      opener = 'open -a "' + escape(appName) + '"';
+  if (appName) {
+    if (appName === '--background') {
+      opener = 'open -g ';
     } else {
-      opener = 'open';
+      opener = 'open -a "' + escape(appName) + '"';
     }
+  } else {
+    opener = 'open';
+}
     break;
   case 'win32':
     // if the first parameter to start is quoted, it uses that as the title