#include <stdio.h>
#include <unistd.h>
#include <termios.h>

int main()
{
  struct winsize sz;

  printf("isatty 0=%d\n", isatty(0));
  if (ioctl(0,TIOCGWINSZ, &sz) == 0) {
     printf("ioctl succeeded. sz.ws_row=%d\n", sz.ws_row);
  }
  return 0;
}