How can I push a Oracle Stored Procedure to execute a HOST OS shell?

I am trying to push a request to execute a script on the OS (Unix). I've seen some examples using Java, but I want this to be Java-independent, if possible.
From the SQL*PLUS command line I can issue a HOST statement (Example: HOST ls -l /home/userid sends the ls -l command to the OS). I don't believe this is supported directly via the JDBC. From a security standpoint, I am fine with that. I would like to be able to create a stored procedure that would execute a specific shell script.
I am not sure how this could be done, easily.

I've seen some examples using Java, but I want this to be Java-independent,A novel and admirable sentiment, but why?
Some standard supplied PL/SQL packages use Java for certain things that it is actually useful for and this is one of them.
The standard approach uses Java, but once you have compiled those 42 lines of code you can forget they were written in Java if you like.
http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:952229840241

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