title: Get notified of ntp adjustments
body: <p>I am in a weird situation and I need some direction with NTP time adjustments. </p>
  
  <p>I have a PC (Red Hat) that runs NTP daemon and this PC adjusts its time with a Stratum 2 time server on my LAN.</p>
  
  <p>My PC is also connected to a DVR over serial port (RS-232). This device and my PC time needs to in synchronization. </p>
  
  <p>However after some time the clocks of my PC and DVR begin to drift away, so I need a way of detecting time adjustment on my PC and apply same adjustment to DVR as well.</p>
  
  <p>Is there any way of doing this ?</p>
  
  <p>I am hoping to find a way of subscribing to some kind of event at OS level for system clock changes on Red Hat. (If this is possible at all for RedHat)</p>
  
  <p>It seems it is possible on Windows with <a href="http://msdn.microsoft.com/en-us/library/microsoft.win32.systemevents.timechanged.aspx" rel="nofollow">SystemEvents.TimeChanged</a> event but I could not find a counterpart on RedHat using C++.</p>
  
  <p>Any help is appreciated.</p>