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# We create 5 child processes.
5.times do
fork do
# Each generates a random number. If even they exit
# with a 111 exit code, otherwise they use a 112 exit code.
if rand(5).even?
exit 111
else
exit 112
end
end
end
5.times do
# We wait for each of the child processes to exit.
pid, status = Process.wait2
# If the child process exited with the 111 exit code
# then we know they encountered an even number.
if status.exitstatus == 111
puts "#{pid} encountered an even number!"
else
puts "#{pid} encountered an odd number!"
end
end
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