#!/bin/sh
#
# This file is in the public domain

# Process options - or how to do getopt(3) in shell scripts ;-)
DEBUG=0
USAGE=0
while [ -n "$1" ]	# Loop as long as $1 is nonempty
do
	case $1 in
		-d)
			DEBUG=1
			shift
			;;
		-h)
			USAGE=1
			shift
			;;
		*)
			# If this is not the last argument, it's an
			# unknown option - complain. Otherwise it's
			# the positional argument, and we're done
			# with the loop.
			if [ -n "$2" ] 	    # If $2 is nonempty, $1 is not last
			then
				echo ERROR: Unknown option $1
				USAGE=1
				shift
			else
				break
			fi
			;;
	esac
done

if [ $USAGE = 1 ]
then
	echo "Usage: delay [-d]"
	echo "       delay -h"
	exit 1
fi

# Loop, answering requests
while : 
do
	# Read message
	IFS='='
	while read ATR VAL && [ -n "$VAL" ]
	do
		IFS=' '
		[ "int" = "$ATR" ] && DELAY=$VAL
		IFS='='
	done
	IFS=' '

	# Show debugging output if requested
	[ $DEBUG = 1 ] && echo "delay[$$]: delay=$DELAY" 1>&2

	# Reply
 	sleep $DELAY
	echo "int=$?
"

done