xdisplay          108 lib/tty/tty.c      const char *xdisplay;
xdisplay          117 lib/tty/tty.c      xdisplay = getenv ("DISPLAY");
xdisplay          118 lib/tty/tty.c      if (xdisplay != NULL && *xdisplay == '\0')
xdisplay          119 lib/tty/tty.c          xdisplay = NULL;
xdisplay          128 lib/tty/tty.c          || (strncmp (termvalue, "screen", 6) == 0 && xdisplay != NULL);