Routing table change notification on Mac OS X

Question

I would like to monitor routing table changes on Mac OS X. Is there any way to catch the changes of the routing table? Just like API NotifyRouteChange on Microsoft Windows, which would causes a notification to be sent to the caller whenever a change occurs in the IPv4 routing table.

Answer 1

well,i turned to route(8) command source code, and i found the modifier 'monitor'. "sudo route monitor"