which is my login terminal

[Guido van Rossum]

In shell scripts, do the following:

	case `tty` in
	/dev/console)	CONSOLE=YES;;
	*)		CONSOLE=NO;;
	esac

The equivalent 'C' code is:

bool on_console() {
	int i;
	/* Search file descriptors 0, 1, 2 for a device name */
	for (i= 0; i <= 2; ++i) {
		char *p= ttyname(i);
		if (p != 0 && strcmp(p, "/dev/console") == 0)
			return YES;
	}
	return NO;
}

Of course this returns NO in a window -- there you can't 'scribble all
over the display' as the original poster asked.

Guido van Rossum, CWI, Amsterdam <guido at mcvax.uucp>