echo from csh script not showing up on terminal

Question

I am currently executing a csh shell script from a GUI button. The script originally calls another sql script to select information from a database and output it to a log file in the tmp directory. I now need to CAT that file and display it on the xterm window. I use the java Runtime.exec() method to execute the command and I figured I have two options that I can use

1. Redirect the std output to show it on the xterm
2. Read from the log file using the csh script and ouytput to xterm

So I chose option 2 and I cannot even get the csh script to output a simple hello world which means I cannot out put anything to the screen when I run it from netbeans. When I try to run the script directly from the xterm it works . Here is the script code

#!/bin/csh -f



#set MYSQL=${MYSQL_HOME}/mysql
#set PSQL=${PSQL_HOME}/psql

echo "Hello World"

#set      REPORT=${CLEADM_HOME}/Scripts/DataValidation/CLEADM_EarthOrientationParametersDataReport.sql


#${REPORT}

#${PSQL} ${CLEDBUSER}<${REPORT} 

#Get the number of lines in the report file for scrollbar control
#set lc='wc -l /tmp/results.log'
#echo $lc

I commented everything out just to see if I could even print (echo) the results to the screen and that doesn't work. When I run it from the xterm directly (~/.mysqlconnection.csh) it seems to work and prints out "Hello World". I do not know what is wrong. So i tried to force the terminal to come up by adding this code at the top of my script

/usr/openwin/bin/XTERM \    this opens up the xterm but leaves it frozen for some reason? now i cant access anything on my computer

below is the code i use to exeucte the csh script from a java button. i call this method behond the button

public class RunShellScript {

public static void runShellScript (String unixCommand) 
{
 try {
     Runtime runtime=Runtime.getRuntime();
     Process process=runtime.exec(new String [] { "/bin/csh", "-c", unixCommand});

     InputStream stderr=process.getErrorStream();
     InputStreamReader isr=new InputStreamReader (stderr);
     BufferedReader br=new BufferedReader (isr);
     String line=null;
     System.out.println("<ERROR>");


     while((line=br.readLine())!=null)
         System.out.println(line);

     System.out.println(line);
     int exitVal=process.waitFor();
     System.out.println("Process exitValue:" + exitVal);
 }
 catch (Throwable t)
 {
     t.printStackTrace();
 }

somewhere i need to redirect the output to an exterm and i am confused as to how to dop that using the streamreader

Answer 1

EDIT - I'm completely starting over with my answer since I badly misunderstood the requirements.

If you want a new window each time the user presses the button, then opening an xterm from the csh script should work; try this:

/usr/openwin/bin/xterm -e "bash -c 'cat /tmp/results.log; echo press a key to continue; read'" &

If you want one window that stays open forever, but keeps updating with new results each time the user presses the button, that's a little different. I would try spawning the other window from Java. You could either have a separate Java window/frame, or use another xterm. To use another xterm, try running a Process somehow, like this:

new ProcessBuilder("/usr/openwin/bin/xterm","-e","tail -f /tmp/results.log").start();

That will open up the tail -f command on the results.log file, and everything you add to the log file will show up in the xterm.