#!/bin/sh

if [ $# -eq 0 ]; then
  echo "usage: timex [ -t sec ] command" >&2
  exit 1
fi

interval=60

if [ "a$1" = a-t ]; then
  shift
  if [ $# -eq 0 ]; then
    echo "usage: timex [ -t sec ] command" >&2
    exit 1
  fi
  if [ "$1" -le 0 ]; then
    echo "timex -- -t specification must be > 0" >&2
    exit 1
  fi
  interval="$1"
  shift
fi

if [ $# -eq 0 ]; then
  echo "usage: timex [ -t sec ] command" >&2
  exit 1
fi

$* &
pid=$!

sleep $interval

if kill -0 $pid > /dev/null 2>&1 ; then
  kill -9 $pid > /dev/null 2>&1
fi