Java Answers Forum - help with passing a unix script varible to a java program

Articles |
News |
Weblogs |
Books |
Forums

Artima Forums | Articles | Weblogs | Java Answers | News

Sponsored Link •

Java Answers Forum
help with passing a unix script varible to a java program

1 reply on 1 page. Most recent reply: Jun 26, 2002 6:06 PM by Matt Gerrans

Welcome Guest
Sign In

Back to Topic List

Reply to this Topic

Search Forum

Threaded View


Previous Topic		Next Topic

Flat View: This topic has 1 reply on 1 page

Tanveer Hossain

Posts: 1
Nickname: thossain
Registered: Jun, 2002

help with passing a unix script varible to a java program

Posted: Jun 26, 2002 2:30 PM

i have a unix shell script that contains:
#! /bin/ksh

#loading the modules
module load msjava/jdk/1.2.2

java TestProg &
PID=$!

java NetVeryCool
java AlertNetCool
======================================
and my java program is:
import java.io.*;

public class AlertNetCool {

public static void main(String args[]) {

String s = null;

try {

// run the Unix command

Process p = Runtime.getRuntime().exec("ps -ef | grep $PID | grep -v grep");

BufferedReader stdInput = new BufferedReader(new
InputStreamReader(p.getInputStream()));

BufferedReader stdError = new BufferedReader(new
InputStreamReader(p.getErrorStream()));

// store the output from the command in
// a string and if null call netcool

System.out.println("Here is the standard output of the command:\n");
while ((s = stdInput.readLine()) != null) {
System.out.println(s);
}

System.out.println("Here is the standard error of the command (if any):\n");
while ((s = stdError.readLine()) != null) {
System.out.println(s);
}

System.exit(0);
}
catch (IOException e) {
System.out.println("exception happened - here's what it is: ");
e.printStackTrace();
System.exit(-1);
}
}
}
===================
question: how do i pass in $PID in my java program's Process p

Matt Gerrans

Posts: 1153
Nickname: matt
Registered: Feb, 2002

Re: help with passing a unix script varible to a java program

Posted: Jun 26, 2002 6:06 PM

Use the -D command option of java to pass the variable into the program, then use System.getProperties() inside the program to get the value from the Properties object returned.

Flat View: This topic has 1 reply on 1 page

Previous Topic

Next Topic


	Web Artima.com