I know it's possible to run a job with the 'nohup' prefix such that
you can logout and have the job continue to run. You can also set
a 'trap' in the code to ignore HUP signals BUT is it possible to
tell a program that is already running to ignore HUP signals.
Let's say you have a job that has been running for several hours and
you want to logout and have it continue to run and you don't want to
start over with 'nohup a.out'. Is this possible under the Korn shell?