Method RecvString

core/utils/fifo_test.cc:286–302

Receives a string. Returns true if it gets one. See SendString.

// Receives a string.  Returns true if it gets one.  See SendString.
bool PtoP::RecvString(int fd, std::string *str, size_t maxlen) {
  char buf[maxlen];
  for (int tries = 0; tries < kMaxTries;) {
    ssize_t nread = read(fd, buf, sizeof buf);
    if (nread > 0) {
      *str = std::string(buf, nread);
      return true;
    }
    if (nread != -1 || (errno != EAGAIN && errno != EWOULDBLOCK)) {
      break;
    }
    if (++tries < kMaxTries) {
      std::this_thread::sleep_for(short_sleep);
    }
  }
  return false;
}

// Send message to parent or child, figuring out which way
// automatically.