Programmatically wake display on OSX

Question

I\'ve managed to get the display to sleep immediately with

pmset displaysleepnow

in terminal, however for waking the display I\'ve only found

Answer 1

Got it working with:

  IOPMAssertionID assertionID; 
  IOPMAssertionDeclareUserActivity(CFSTR(""), kIOPMUserActiveLocal, &assertionID);

Answer 2

Here is the answer in Swift 3.x:

var assertionID : IOPMAssertionID = 0
 _ = IOPMAssertionDeclareUserActivity("" as CFString, kIOPMUserActiveLocal, &assertionID)