The following updates, fix KVM for openSUSE and other distros with similar behavior

1. Removed 'setDisplay()' because it doesn't work
2. Added more descriptive error message when XOpenDisplay fails
3. Added ability to set XAUTHORITY in the child process if it wasn't set, by finding how X was started

test/authtest.js

@@ -1,16 +1,25 @@
-var child = require('child_process').execFile('/bin/sh', ['sh']);
-child.stdout.str = '';
-child.stdin.write('ps -e -o user -o command | awk {\'printf "%s,",$1;$1="";printf "%s\\n", $0\'} | grep X\nexit\n');
-child.stdout.on('data', function (chunk) { this.str += chunk.toString(); });
-child.waitExit();
-
-var lines = child.stdout.str.split('\n');
-for (var i in lines)
+function getAuthToken()
 {
-    var tokens = lines[i].split(',');
-    console.log(tokens[0] + ' => ' + tokens[1]);
+    var child = require('child_process').execFile('/bin/sh', ['sh']);
+    child.stdout.str = '';
+    child.stdin.write('ps -e -o user -o command | awk {\'printf "%s,",$1;$1="";printf "%s\\n", $0\'} | grep X\nexit\n');
+    child.stdout.on('data', function (chunk) { this.str += chunk.toString(); });
+    child.waitExit();
+
+    var lines = child.stdout.str.split('\n');
+    for (var i in lines) {
+        var tokens = lines[i].split(',');
+        if (tokens[0]) {
+            var items = tokens[1].split(' ');
+            for (var x = 0; x < items.length; ++x) {
+                if (items[x] == '-auth' && items.length > (x + 1)) {
+                    return (items[x + 1]);
+                }
+            }
+        }
+    }
+    return (null);
 }
 
-
-//console.log(child.stdout.str);
+console.log('AuthToken => ' + getAuthToken());
 process.exit();