# change file ownership to specified user id and restrict access to him.
# usage: own [USER] [FILES]
own() 
{
  local file="${2}"
  local user="${1}"

  # default to current dir.
  if [ "${file}" = "" ]; then
    file='.'
  fi

  # default to current user.
  if [ "${user}" = "" ]; then
    user="${UID}"
  fi

  # set ownership.
  chown "${user}":"${user}" -R "${file}" &> /dev/null

  # remove access from group and others.
  chmod -077 -R "${file}"
}