text: // Copyright (c) 2006, 2007 Julio M. Merino Vidal
  // Copyright (c) 2008 Ilya Sokolov, Boris Schaeling
  // Copyright (c) 2009 Boris Schaeling
  // Copyright (c) 2010 Felipe Tanus, Boris Schaeling
  // Copyright (c) 2011, 2012 Jeff Flinn, Boris Schaeling
  //
  // Distributed under the Boost Software License, Version 1.0. (See accompanying
  // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
  
  #ifndef BOOST_PROCESS_POSIX_WAIT_FOR_EXIT_HPP
  #define BOOST_PROCESS_POSIX_WAIT_FOR_EXIT_HPP
  
  #include <boost/process/config.hpp>
  #include <boost/system/error_code.hpp>
  #include <sys/types.h>
  #include <sys/wait.h>
  
  namespace boost { namespace process { namespace posix {
  
  template <class Process>
  inline int wait_for_exit(const Process &p)
  {
      pid_t ret;
      int status;
      do
      {
          ret = ::waitpid(p.pid, &status, 0);
      } while ((ret == -1 && errno == EINTR) || (ret != -1 && !WIFEXITED(status)));
      if (ret == -1)
          BOOST_PROCESS_THROW_LAST_SYSTEM_ERROR("waitpid(2) failed");
      return status;
  }
  
  template <class Process>
  inline int wait_for_exit(const Process &p, boost::system::error_code &ec)
  {
      pid_t ret;
      int status;
      do
      {
          ret = ::waitpid(p.pid, &status, 0);
      } while ((ret == -1 && errno == EINTR) || (ret != -1 && !WIFEXITED(status)));
      if (ret == -1)
          BOOST_PROCESS_RETURN_LAST_SYSTEM_ERROR(ec);
      else
          ec.clear();
      return status;
  }
  
  }}}
  
  #endif
  