Reputation: 186
Why does the the following code print false ? I am trying to an environment variable in the test.sh script and collect it in java. Please suggest an alternative approach, if possible.
public static void main(String[] args){
ProcessBuilder processBuilder = new ProcessBuilder("test.sh");
Process process;
int exitCode;
try {
process = processBuilder.start();
exitCode = process.waitFor();
} catch (IOException e) {
e.printStackTrace();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Map<String, String>envVars = processBuilder.environment();
System.out.println(envVars.keySet().contains("SOURCE"));
}
And the code for test.sh script is simply
set SOURCE=source
Upvotes: 1
Views: 316
Reputation: 11621
The ProcessBuilder.environment()
method is used for passing the initial environment to the process when you call start()
. You cannot get the environment of a subprocess from a parent process. This is not a Java restriction: you can't even get a subprocess environment from a Bash shell script (or in fact anything) that creates a subprocess. You need to find another means of communicating information from the subprocess back to the parent process.
Upvotes: 2
Reputation: 163
In my opinion, you should change:
ProcessBuilder processBuilder = new ProcessBuilder("test.sh");
to
ProcessBuilder processBuilder = new ProcessBuilder("/bin/bash", "test.sh");
processBuilder.directory(new File(the-dir-of-test.sh));
Upvotes: 0