Function wait_for_child_exit

cpp-subprocess/subprocess.hpp:760–773

! * Function: wait_for_child_exit * Waits for the process with pid `pid` to exit * and returns its status. * Parameters: * [in] pid : The pid of the process. * [out] pair : * pair.first : Return code of the waitpid call. * pair.second : Exit status of the process. * * NOTE: This is a blocking call as in, it will loop * till the child is exited.

   *  till the child is exited.
   */
  static inline
  std::pair<int, int> wait_for_child_exit(int pid)
  {
    int status = 0;
    int ret = -1;
    while (1) {
      ret = waitpid(pid, &status, 0);
      if (ret == -1) break;
      if (ret == 0) continue;
      return std::make_pair(ret, status);
    }

    return std::make_pair(ret, status);
  }
#endif

} // end namespace util