static bool getIdOf(const std::string& owner, const std::string pattern, id_t& id)
{
  Popen3 pr("id", {owner});
  pr.run(true);
  int exitCode = pr.wait();
  if (exitCode) {
    std::cerr << "ERROR code: " << exitCode << ", Output was: " << pr.stdOutAndStdErr();
    return false;
  }

  auto output = pr.stdOut();
  std::regex rgx(pattern);
  std::smatch match;
  if (std::regex_search(output, match, rgx)) {
    id = atol(match.str(1).c_str());
    return true;
  }

  return false;
}