Get return code and status from bash script into Java file

Question

I am working in JavaFX scene builder App where at some point my code flow execution is like below:

From my Java class a bash script script1 called From MyClass.java

exec(./Script1)

in script1 an another script script2 called

called ./script2

script2 an another script script3 called

In script3

if [ ! "$upgrade_file_path" = "" ]; then
    echo "BUILD SUCCESS"
    echo "upgrade.cpio.gz : "$upgrade_file_path
    //LINE-1
else
    echo "FAILED TO CREATE upgrade.cpio.gz"
fi

What I need :

LINE-1 : Can I return some exit code from here to my java file (MyClass.java), I need to show the BUILD SUCESS string along with $upgrade_file_path and an exit code in my javafx label. Or I can save this exit code,path and status in a string in my MyClass.java file?

Update:

I am using an external jar to connect SSH. What I am trying to do is to connect a linux machine from my windows machine, and to achieve this I have used sshexec.jar https://code.google.com/p/sshxcute/downloads/list

where below code does the job of connecting and executing the bash script

        ConnBean cb = new ConnBean(buildServerURL, buildServerUsername,buildServerPassword);
        // Put the ConnBean instance as parameter for SSHExec static method getInstance(ConnBean) to retrieve a singleton SSHExec instance
        ssh = SSHExec.getInstance(cb);          
        //Connect to server
        ssh.connect();
        CustomTask sampleTask = new ExecCommand("/usr/init/checkout.sh");
        //Execution of main taks
        Result rs = ssh.exec(sampleTask);

There are good examples in the page for the project you are using: code.google.com/p/sshxcute (3.5 and 3.6). Did you look at them? Did you try using what is shown there? — Itai
– Itai, Commented Jan 7, 2016 at 10:52
Yes! rc (result code will print 0 if the last command gets executed), what I am trying to do is in my script I have written exit 5; I want this value 5 in result code. That is not happening with rc here. — MonsterJava
– MonsterJava, Commented Jan 7, 2016 at 10:56

Community · Accepted Answer · 2017-06-16 11:26:58Z

In order to execute shell command from java we need to use some library, in your case you are using SSHExec, in this jar you can have the result/exit code that is returned from the shell script.

if [ ! "$upgrade_file_path" = "" ]; then
    echo "BUILD SUCCESS"
    echo "upgrade.cpio.gz : "$upgrade_file_path
    //Here you can just add something like:
    exit 0;
else
    echo "FAILED TO CREATE upgrade.cpio.gz"
    exit 1;
fi

when the above scripts executes an exit code will be thrown from here and you can have this exit code in your java application something like this:

    ConnBean cb = new ConnBean(buildServerURL, buildServerUsername,buildServerPassword);
    // Put the ConnBean instance as parameter for SSHExec static method getInstance(ConnBean) to retrieve a singleton SSHExec instance
    ssh = SSHExec.getInstance(cb);          
    //Connect to server
    ssh.connect();
    CustomTask sampleTask = new ExecCommand("/usr/init/checkout.sh");
    //Execution of main taks
    Result rs = ssh.exec(sampleTask);
    int exitCode = rs.rc; //rc stands for result code, and this rc will have what shell returned.rc is not a function but a int variable of Result class.
    if(exitCode!=0){
      //Error message
}else 
     //Success message.

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