irods rules not always return an error

utils/irodsConnector.py

@@ -733,14 +733,19 @@ class irodsConnector():
         stderr = []
         if len(out.MsParam_PI) > 0:
             try:
-                stdout = [o.decode() 
-                    for o in (out.MsParam_PI[0].inOutStruct.stdoutBuf.buf.strip(b'\x00')).split(b'\n')]
-                stderr = [o.decode() 
-                    for o in (out.MsParam_PI[0].inOutStruct.stderrBuf.buf.strip(b'\x00')).split(b'\n')]
+                if out.MsParam_PI[0].inOutStruct.stdoutBuf.buf != None:
+                    stdout = [o.decode() 
+                        for o in (out.MsParam_PI[0].inOutStruct.stdoutBuf.buf.strip(b'\x00')).split(b'\n')]
+                else:
+                    stdout = ""
+                if out.MsParam_PI[0].inOutStruct.stderrBuf.buf != None:
+                    stderr = [o.decode() 
+                        for o in (out.MsParam_PI[0].inOutStruct.stderrBuf.buf.strip(b'\x00')).split(b'\n')]
+                else:
+                    stdout = ""
             except AttributeError:
                 logging.info('RULE EXECUTION ERROR: '+str(stdout+stderr), exc_info=True)
-                return stdout, stderr
-        
+                return "", ""
         return stdout, stderr