static void classicNohupJavaxWithChdir(String javaxargs) {
  classicNohupJavaxWithChdir(javaxargs, "");
}

static void classicNohupJavaxWithChdir(String javaxargs, String vmArgs) ctex {
  int x = latestInstalledJavaX();
  File xfile = new File(userHome(), ".javax/x" + Math.max(x, 30) + ".jar");
  if (!xfile.isFile()) {
    String url = "http://tinybrain.de/x30.jar";
    byte[] data = loadBinaryPage(url);
    if (data.length < 1000000)
      fail("Could not load " + url);
    saveBinaryFile(xfile.getPath(), data);
  }
  String jarPath = xfile.getPath();
  if (javaxargs.startsWith("#")) javaxargs = javaxargs.substring(1);
  
  S progID = onlyUntilSpace(javaxargs);
  File progDir = programDir(progID);
  mkdir(progDir);
  print("ProgDir: " + platformQuote(f2s(progDir)));
  S javaCmd = "java " + vmArgs + " -jar " + platformQuote(jarPath) + " " + javaxargs;
  S cmds;
  if (isWindows())
    cmds = "(cd " + platformQuote(f2s(progDir)) + " & " + javaCmd + ")";
  else
    cmds = "/bin/bash -c " + platformQuote(
      "cd " + platformQuote(f2s(progDir)) + " ; " + javaCmd);
  nohup(cmds);
}

Began life as a copy of #1000838