Basic mechanism of forking
this example from a Well House Consultants training course
Source code: table Module: Y303
from os import *
# Single process ...
# becomes two processes!
gerald = fork()
if not gerald:
# child - doesn't know parent's PID
print "Let's go BA"
# Typically - do the child stuff / external process
# then exit()
# parent - gets process id of child
# typically loop to see when another process is needed
# They talk through pipes and signals
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