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stop parent process

Lee Xu
Ranch Hand

Joined: Aug 24, 2001
Posts: 77
hi,
Is it possible to stop parent process before the end of child process? How? I got this question during interview.
Thanks
James Gray
Ranch Hand

Joined: Sep 10, 2001
Posts: 30
I should probably preface this answer with that fact that I have never launched a single process from a Java application before.
However, a quick trip over to the API and I'm pretty sure I can safely say yes. The Process object, returned by Runtime.exec(), has a destory() method that appearently forcably terminates the process.
That's a pretty ugly interview question, in my opinion. Is it common to be such a specific question in Java position interviews?
Michael Ernest
High Plains Drifter
Sheriff

Joined: Oct 25, 2000
Posts: 7292

Is this even a Java question? is what I'm curious about, since process creation and handling is not a platform-independent discussion.
When a parent dies, it may HUP dependent child processes; you may see this behavior when you close the window that launched your browser, taking the browser with it.
nohup(1), when used to load a command, allows the resulting process to ignore the death of its parent and continue processing.
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Michael Ernest, co-author of: The Complete Java 2 Certification Study Guide


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Sagar Bilgi
Ranch Hand

Joined: Apr 26, 2001
Posts: 37
I believe it was more of an OS question. I know at least in Unix, if a parent process dies before the child completes execution the child becomes an orphan process and is adopted by the init process.( I think it has a PID of 1 )
Sagar
 
It is sorta covered in the JavaRanch Style Guide.
 
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