Flowscript file permissions on mkdir - pls help!

[Dan Hertz]

Hi,

The following flowscript dynamically makes a directory and uploads a 
photo to it:

===Extracts===

 var uploadWidget = form.lookupWidget("upload");
 if (uploadWidget.getValue() != null) {
    
     // test if user directory exists, if not, create it
      if (!userDir.exists()) {        
          userDir.mkdirs();
      }
   uploadWidget.getValue().copyToFile(userDir + "/" + fileName);
 }

===========

On Windows this works great; but on LINUX, the folder gets created with 
0755 permissions (set by my ISP). This is insufficient to run my PHP 
script on the photo -- which needs the folder to be set to 0774.

How do I set the folder permission values from this flowscript?

Thanks for helping this total newbee!

Daniel

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