Question

I am writting this code for a JSP page that reads from an text input and passes the variables’ values to a bash file as parameters, but it seems like the bash file doesn’t take variables, it only worked when I passed real values instead of variables.
How to pass a variable to this bash file?
Here is the code:

<%
   String myArgument = ""; 

   if (request.getParameter("submit")==null)
   {
%>
<form method="POST" action="/tomcat/webapps/project/jsp/runCMD.jsp" id=form2>   
         <input type=text id=first value="${first}"  Title="IP adress here" >


      <input type="submit" value="Submit Changes" name="submit"   

      onClick="if(runOnSubmit()){getSomethingWithAjax('ChangeIP.jsp'+
      getAllFormElementsAndMakeIntoURI(true),'',
      'hereIsTheMainHeaderSpan',false,false);}">
 <%
 }//end if
 //else if submitted
 else {
 request.setAttribute("myArgument", myArgument);

       try {
     Process p = Runtime.getRuntime().exec("/root/script.cmd myArgument );
     p.waitFor();
     System.out.println("Waiting for the System to reboot" + p.exitValue());


} catch (Exception e) {
    System.out.println(e.getMessage());
            out.println("There was an error while submitting ");
} 

 }//end else

 %>

Note that when passing a value to the script it got executed with the code below:

Process p = Runtime.getRuntime().exec("/root/changeip.cmd 10.0.100.18");

Answer 1

What you want is:

Process p = Runtime.getRuntime().exec("/root/script.cmd " + myArgument );

P.S.
Actually I don’t see where do you assign a value to myArgument after declaring it:
String myArgument = "";

---

Not really related, but you are doing it kind of PHP style. Read this: https://stackoverflow.com/a/3180202/814702