Dealing with runtime.exec() I/) streams

[John Davis]

I am invoking a communications utility via runtime.exec().

  
try
{
  StringpscpCommand= new String("c:\\putty\\pscp ");
  pscpCommand+=(
                             yourUserID  + 
                             "@xyz." + 
                             lparDomainName + 
                             ".abc.def.ghi.xyz:\"/CM/Dev_SW/"+
                             dropName+
                            "/Program Implementation/XXX Design/WMQI/Message                      Flows/*.*\"  "+
          "c:\\" + 
           ABCDIR
);

System.out.println("Execing " + pscpCommand);

Runtime rt = Runtime.getRuntime();
 
        Process pscpProc = rt.exec(pscpCommand);

        // any error message?

        StreamGobbler pscpError = new
                   StreamGobbler(pscpProc.getErrorStream(), "PSCP ERROR");            
            
           // any output?

           StreamGobbler pscpOutput = new
                StreamGobbler(pscpProc.getInputStream(), "PSCP OUTPUT");

InputSubmitter pscpInput = new
                InputSubmitter (pscpProc.getOutputStream(), "PSCP SUBMITTER INPUT",yourPassword);
                
            // kick them off

            pscpError.start();

            pscpOutput.start();

pscpInput.start();
 
            int exitVal = pscpProc.waitFor();

            System.out.println("Process exitValue: " + exitVal);

String newline = "\n";

textArea.append("returnCode from " + pscpCommand + " = " + exitVal + " . . .  " + newline);
}
catch (Throwable t)
          {
            t.printStackTrace();
          }

As you can see, I spawn threads to exhaust and print the error and output streams.

If I deliberately screw up the dns name in the pscp command, I do get an error printed out in the streamGobbler thread for PSCP Errors.

But when the pscp command is specified correctly, the process never terminates supposedly because my program is not obtaining and responding to the request for a password.

But this request never shows up in the PSCP output stream?

Any ideas on how I can obtain and respond to the request for a password when invoking pscp in this way?

[Stefan Wagner]

As you can see, ...

No - that's too bad formatted.
You may edit the post - then perhaps I will spend my time reading it.
If you don't spend your time in writing, why should I in reading?