How to Identify if the process in User Interface Process?

Question

How can I get information from a process that it is UI(User Interface) process or non-ui?

With UI process I mean, Finder, Dock, System UI server, or any other mac a

Answer 1

Try the following.

#include 

  if (isatty(STDIN_FILENO) || isatty(STDOUT_FILENO) || isatty(STDERR_FILENO))
    // Process associated with a terminal
  else
    // No terminal - probably UI process