#!/bin/bash

# Adapted from bits and pieces of /usr/bin/bug, to provide the functions
# that package says are permitted.
#
# /usr/bin/bug is:
# (C) 1996-2000 Christoph Lameter <clameter@debian.org>
#               Nicolás Lichtmaier <nick@debian.org>
# Modifications:
# Copyright (C) 2000 Chris Lawrence <lawrencc@debian.org>
#
# You may freely redistribute, use and modify this software under the terms
# of the GNU General Public License.

set -e

# Wait for a keypress and put it in $KEY
getkey()
{
	stty -icanon min 1 || true 2> /dev/null
	KEY=$(dd bs=1 count=1 2> /dev/null)
	stty icanon || true 2> /dev/null
	KEY="${KEY:0:1}"
	echo
}

export -f getkey
export YESNO="yYnN"

# Usage: yesno <prompt> "yep"|"nop" (<- default)
#	output: REPLY
yesno()
{
	while true; do
		echo -n "$1"

		getkey

		# if 'n'
		if [ "$KEY" = "${YESNO:2:1}" ] || [ "$KEY" = "${YESNO:3:1}" ]; then
			REPLY=nop
			return
		fi

		# if 'y'
		if [ "$KEY" = "${YESNO:0:1}" ] || [ "$KEY" = "${YESNO:1:1}" ]; then
			REPLY=yep
			return
		fi

		# if \n
		if [ "$KEY" = "" ]; then
			REPLY=$2
			return
		fi
	done
}

export -f yesno

#&>3
$1 3>|$2