Java calling bash script : Permission Denied Error

Question

I am trying to call a bash script from a java class .

This is my java program

import java.io.File;

public class RunBuild {
    public static void main(String[] args) {
        File wd = new File("/home/sai/Jan5WS/ATCore/bin/");
        System.out.println("Working Directory: " + wd);
        Process proc = null;
        try {
            proc = Runtime.getRuntime().exec(" . Ram.sh", null, wd);
            System.out.println(proc.getInputStream());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

I have got all the permissions for that script , please see below sai@sai-Aspire-4720Z:~/Jan5WS/ATCore/bin$ chmod 7777 Ram.sh

-rwxrwxrwx 1 sai sai    77 Feb  3 20:53 Ram.sh~
-rwxrwxrwx 1 sai sai    79 Feb  3 20:53 Ram.sh
sai@sai-Aspire-4720Z:~/Jan5WS/ATCore/bin$

Its throwing this exception below

Working Directory: /home/sai/Jan5WS/ATCore/bin
java.io.IOException: Cannot run program "." (in directory
"/home/sai/Jan5WS/ATCore/bin"): error=13, Permission denied
    at java.lang.ProcessBuilder.start(Unknown Source)
    at java.lang.Runtime.exec(Unknown Source)
    at java.lang.Runtime.exec(Unknown Source)
    at RunBuild.main(RunBuild.java:12)
Caused by: java.io.IOException: error=13, Permission denied
    at java.lang.UNIXProcess.forkAndExec(Native Method)
    at java.lang.UNIXProcess.<init>(Unknown Source)
    at java.lang.ProcessImpl.start(Unknown Source)
    ... 4 more

I am using Ubuntu Please let me know what could be the problem ??

Andreas Fester · Accepted Answer · 2013-02-04 11:32:41Z

3

See your error output - you are trying to execute "." which is a directory, not your shell script:

java.io.IOException: Cannot run program "."

Replace the " . " in your exec() call with "./" to indicate the current directory, make sure that your script has the proper shebang line, like #!/bin/bash, and that it is executable (which you already did):

proc = Runtime.getRuntime().exec("./Ram.sh", null, wd);

edited Feb 4, 2013 at 11:32

answered Feb 4, 2013 at 10:26

Andreas Fester

36.8k9 gold badges101 silver badges125 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Some programmer dude · Accepted Answer · 2013-02-04 10:27:44Z

0

While I don't know how the exec function call works in Java, I really doubt it will run a shell and accept shell commands. And the command you want to execute is . which is an internal BASH alias for the source command.

You have to call a shell explicitly instead:

proc = Runtime.getRuntime().exec("/bin/bash -c Ram.sh", null, wd);

answered Feb 4, 2013 at 10:27

Some programmer dude

411k36 gold badges420 silver badges655 bronze badges

Collectives™ on Stack Overflow

Java calling bash script : Permission Denied Error

2 Answers 2

Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related