C non-blocking keyboard input

Question

I\'m trying to write a program in C (on Linux) that loops until the user presses a key, but shouldn\'t require a keypress to continue each loop.

Is there a simple wa

Answer 1

You can do that using select as follow:

  int nfds = 0;
  fd_set readfds;
  FD_ZERO(&readfds);
  FD_SET(0, &readfds); /* set the stdin in the set of file descriptors to be selected */
  while(1)
  {
     /* Do what you want */
     int count = select(nfds, &readfds, NULL, NULL, NULL);
     if (count > 0) {
      if (FD_ISSET(0, &readfds)) {
          /* If a character was pressed then we get it and exit */
          getchar();
          break;
      }
     }
  }

Not too much work :D