How to open a socket below 1024

Question

I am trying to create a ServerSocket on a port below 1024.

Obviously, this restriction is limited only by root permissions.

But I'm afraid to get the correct permissions for my application.

I use this code, for example, to check if I have root access (or starting a dialog)

But it still does not allow me to work with ServerSocket.

AFAIK, a process created using the SU command has root access, not my application. How to root access my own process?

public stat

ic boolean getRoot() {
        try {
            Process p = Runtime.getRuntime().exec("su");
            DataOutputStream os = new DataOutputStream(p.getOutputStream());
            os.writeBytes("echo \"Do I have root?\" >/system/sd/temporary.txt\n");
            os.writeBytes("exit\n");
            os.flush();
            try {
                p.waitFor();
                if (p.exitValue() != 255) {
                    return true;
                } else {
                    return false;
                }
            } catch (InterruptedException e) {
                e.printStackTrace();
                return false;
            }
        } catch (IOException e) {
            e.printStackTrace();
            return false;
        }
    }

Answer 1

Afaik you cannot open a port below 1024 on * nix systems unless you are root ...