background_process

# ---------- example.rb ----------
 
#!/usr/bin/ruby
 
# Determine our parent pid
puts Process.pid
 
10.times do
  puts "Before fork"
  pid = fork do
    sleep 5
    my_pid = Process.pid
    puts "Child pid: #{my_pid}"
    script = "/Users/eric/Desktop/daemon_demo/some_script.sh #{my_pid} &"
    exec script if !fork.nil?
    exit 99
  end
  Process.detach(pid)
  puts "Child pid: #{pid}"
  puts "After fork"
  sleep 1
end
 
puts "END OF PARENT SCRIPT"
 
# ---------- some_script.sh ----------
 
#!/bin/bash
echo "[$@] Starting child process"
sleep 10
echo "[$@] Ending child process"