Process Runtime pass input

Question

I have rsync command to be run in a java program...the problem i am facing is that rsync requires a password to be entered and i am not understanding how to pass this passwo

Answer 1

Took me some time, but here it goes:

    Process ssh = Runtime.getRuntime ().exec (new String[] {"rsync", ... /*other arguments*/});
    Reader stdOut = new InputStreamReader (ssh.getInputStream (), "US-ASCII");
    OutputStream stdIn = ssh.getOutputStream ();

    char[] passRequest = new char[128];//Choose it big enough for rsync password request and all that goes before it
    int len = 0;
    while (true)
    {
        len += stdOut.read (passRequest, len, passRequest.length - len);
        if (new String (passRequest, 0, len).contains ("password:")) break;
    }

    System.out.println ("Password requested");
    stdIn.write ("your_password\n".getBytes ("US-ASCII"));
    stdIn.flush ();

P.S.: I don't really know how rsync works, so you may need to change it a bit - just run rsync manually from a terminal an see how exactly it requests a password.