bind_stderr.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 <unistd.h>
 
#include <boost/iostreams/device/file_descriptor.hpp>
#include <boost/process/posix/initializers/initializer_base.hpp>
 
namespace boost::process::posix::initializers
{
 
    class bind_stderr : public initializer_base
    {
    public:
        explicit bind_stderr(const boost::iostreams::file_descriptor_sink& sink) : sink_(sink)
        {
        }
 
        template <class PosixExecutor>
        void
        on_exec_setup(PosixExecutor&) const
        {
            ::dup2(sink_.handle(), STDERR_FILENO);
        }
 
    private:
        boost::iostreams::file_descriptor_sink sink_;
    };
 
} // namespace boost::process::posix::initializers