Using Java's Runtime.exec to call a Perl script

I presume this is a simple one for a Java expert out there...

 I'm one of the fortunate billions who have a shared Linux hosting account with GoDaddy.  I have a system of Java servlets that work just fine, except the point at which one tries to create a text file to a folder. I have since found that GoDaddy limits Java servlets to write files to the server's /tmp folder only.  Fortunately, languages such as PHP or Perl are allowed to write files anywhere in the hosting account's folder tree. So I've come up with a system wherebye my Java servlet writes a file to /tmp, and then calls a Perl script to move that file to where I want it to go.  This involves the Runtime class, which I need help on.  First, here's what my Perl script looks like...

-----------begin---------------
#!/usr/bin/perl

use CGI;

$q = new CGI;

$oldfile = $q->param('from');
$newfile = $q->param('to');  

rename $oldfile, $newfile;
------------end---------------

Note the 'from' and 'to' tokens.  Can they still be used in this context?  I've always used Perl from HTML forms, so my knowledge is limited.

On the Java side, I've attached my code that's reached after my servlet has written a file "testwrite.txt" to the server's "/tmp" folder.  Of particular concern is how I specified strings in cmdLine[].

The code compiles, but I'd like to know if the way I'm using these calls is valid.


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// Move file from /tmp to /cgi/filetest
  final String homeDir = "/home/content/x/y/z/xyzman/html";
  Runtime rt = Runtime.getRuntime();
  String cmdLine[] = { "/usr/bin/perl", 
                       homeDir + "/cgi/supporttools/filemove.cgi",
                       "from=/tmp/testwrite.txt",
                       "to=" + homeDir + "/cgi/filetest/testwrite.txt"
                     };
  Process moveIt = rt.exec( cmdLine );
      
  // Make sure the process exits...
  try { 
    moveIt.waitFor(); 
  }
  catch (InterruptedException e) {          
    myLogWrite( e.getMessage() );
  }             
             
  int perlExitVal = moveIt.exitValue();
    
  BufferedReader reader = new BufferedReader(new InputStreamReader(moveIt.getInputStream()));
  String perlResponse = reader.readLine();
  myLogWrite( "perlResponse=" + perlResponse );
   
  myLogWrite( perlExitVal==0 ? "success" : "failed" );