From the NannyMUD documentation

LAST CHANGE

2000-12-11

FUNCTION

NAME
        input_to - redirect keyboard input to a function


SYNTAX
	void input_to(string func [, int noecho ])

DESCRIPTION
	With this function it is possible to redirect the keyboard input from
	a player into a function.

	The function `func' is then called with the next string from the 
	player that was this_player() at the call of input_to instead of
	interpreting it as a command.

	If `noecho' is given, the string is not echoed on the player's screen;
	this is good for passwords and such.


NOTE
	This only works for interactive players. This will not work
	for an npc of any kind.