#!/bin/bash
declare -r ARGV0='vc-thm'

pull_url () {
	local i=0

	echo -n "$ARGV0: " >&2
	while true
	do
		sleep 0.5 & # limit rate to one per 500 ms

		curl -sSL "$1" > /dev/null
		wait

		let 'i += 1'
		echo -n "$i " >&2
	done
}

if [ "$#" -lt 2 ]; then
	echo "Usage: $ARGV0 <URL> [TIMEOUT]" >& 2
	exit 2
fi

TIMEOUT="$2"


set -e
pull_url "$1" &
CHILD="$!"
sleep "$TIMEOUT"
set +e

kill -TERM "$CHILD"
wait
echo >&2

exit 0 # don't care about the exit code from pull_url