SystemMaybe Fs::readIsPopulatedAt()

in src/oomd/util/Fs.cpp [338:357]

• 19 lines of code
• 7 McCabe index (conditional complexity)

SystemMaybe<bool> Fs::readIsPopulatedAt(const DirFd& dirfd) {
  auto lines = readFileByLine(Fs::Fd::openat(dirfd, kEventsFile));
  if (!lines) {
    return SYSTEM_ERROR(lines.error());
  }
  for (const auto& line : *lines) {
    std::vector<std::string> toks = Util::split(line, ' ');
    if (toks.size() == 2 && toks[0] == "populated") {
      if (toks[1] == "1") {
        return true;
      } else if (toks[1] == "0") {
        return false;
      } else {
        return SYSTEM_ERROR(EINVAL);
      }
    }
  }

  return SYSTEM_ERROR(EINVAL);
}