wait_for_exit.hpp

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// 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)
 
#pragma once
 
#include <boost/process/config.hpp>
#include <boost/system/error_code.hpp>
#include <sys/types.h>
#include <sys/wait.h>
 
namespace boost::process::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;
    }
 
}