Ruby进程的真伪是不是我理解的这样？

p1 = Process.fork{
  while true
  sleep 1
  p "p1 1 seconds #{Process.pid};"
  `echo $$>>temp.pid`
  end
}
p2 = Process.fork{
  while true
  sleep 2
  p "p2 2 seconds #{Process.pid};"
  system("ll")
  end
}

#~ Process.detach(p1)
#~ Process.waitpid(p2)

while true
        sleep 5
        puts 'this is caller! '+Process.pid.to_s
end

require 'rubygems'
require 'win32/process'

p1 = Process.fork do
  while true
    sleep 1
    p "p1 1 seconds #{Process.pid};"
    `echo $$>>temp.pid`
  end
end

p2 = Process.fork do
  while true
    sleep 2
    p "p2 2 seconds #{Process.pid};"
    system("ll")
  end
end

#~ Process.detach(p1)
#~ Process.waitpid(p2)

while true
  sleep 5
  puts 'this is caller! '+Process.pid.to_s
end

command = %q[ruby -e "puts 'a'"]
command << 0
params = [
    'L', # IN LPCSTR lpApplicationName
    'P', # IN LPSTR lpCommandLine
    'L', # IN LPSECURITY_ATTRIBUTES lpProcessAttributes
    'L', # IN LPSECURITY_ATTRIBUTES lpThreadAttributes
    'L', # IN BOOL bInheritHandles
    'L', # IN DWORD dwCreationFlags
    'L', # IN LPVOID lpEnvironment
    'L', # IN LPCSTR lpCurrentDirectory
    'P', # IN LPSTARTUPINFOA lpStartupInfo
    'P'  # OUT LPPROCESS_INFORMATION lpProcessInformation
]
# 这里还要写 n 行获取各种句柄及常数的语句……
startupInfo = [STARTUP_INFO_SIZE, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW, 0,
      0, 0, stdin, stdout, stderr].pack('IIIIIIIIIIIISSIIII')
processInfo = [0, 0, 0, 0].pack('IIII')
createProcess = Win32API.new("kernel32", "CreateProcess", params, 'I')
createProcess.call(0, command, 0, 0, 1, 0, 0, 0, startupInfo, processInfo)