Merge "update_verifier: Handle legacy care_map.txt gracefully."

  return true;

}

// Returns true to indicate a passing verification (or the error should be ignored); Otherwise

// returns false on fatal errors, where we should reject the current boot and trigger a fallback.

// Note that update_verifier should be backward compatible to not reject care_map.txt from old

// releases, which could otherwise fail to boot into the new release. For example, we've changed

// the care_map format between N and O. An O update_verifier would fail to work with N

// care_map.txt. This could be a result of sideloading an O OTA while the device having a pending N

// update.

bool verify_image(const std::string& care_map_name) {

  android::base::unique_fd care_map_fd(TEMP_FAILURE_RETRY(open(care_map_name.c_str(), O_RDONLY)));

  // If the device is flashed before the current boot, it may not have care_map.txt

  }

  for (size_t i = 0; i < lines.size(); i += 2) {

    // We're seeing an N care_map.txt. Skip the verification since it's not compatible with O

    // update_verifier (the last few metadata blocks can't be read via device mapper).

    if (android::base::StartsWith(lines[i], "/dev/block/")) {

      LOG(WARNING) << "Found legacy care_map.txt; skipped.";

      return true;

    }

    if (!read_blocks(lines[i], lines[i+1])) {

      return false;

    }