Make sure all output is processed and none is left buffered when the native process completes

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@270868 13f79535-47bb-0310-9956-ffa450edef68

proposal/myrmidon/src/java/org/apache/aut/nativelib/impl/ProcessMonitor.java

@@ -118,9 +118,7 @@ class ProcessMonitor
     {
         while( STATE_RUNNING == m_state )
         {
-            processStandardInput();
-            processStandardOutput();
-            processStandardError();
+            processStreams();
 
             if( !isProcessStopped() )
             {
@@ -137,11 +135,25 @@ class ProcessMonitor
             }
         }
 
+        //Process streams again to make sure
+        //that we have got all the data
+        processStreams();
+
         IOUtil.shutdownStream( m_input );
         IOUtil.shutdownStream( m_output );
         IOUtil.shutdownStream( m_error );
     }
 
+    /**
+     * Utility method to process all the standard streams.
+     */
+    private void processStreams()
+    {
+        processStandardInput();
+        processStandardOutput();
+        processStandardError();
+    }
+
     /**
      * Check if process has stopped. If it has then update state
      * and return true, else return false.