detail/posix/close_out.hpp

0001 // Copyright (c) 2006, 2007 Julio M. Merino Vidal
0002 // Copyright (c) 2008 Ilya Sokolov, Boris Schaeling
0003 // Copyright (c) 2009 Boris Schaeling
0004 // Copyright (c) 2010 Felipe Tanus, Boris Schaeling
0005 // Copyright (c) 2011, 2012 Jeff Flinn, Boris Schaeling
0006 //
0007 // Distributed under the Boost Software License, Version 1.0. (See accompanying
0008 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
0009
0010 #ifndef BOOST_PROCESS_DETAIL_POSIX_CLOSE_OUT_HPP
0011 #define BOOST_PROCESS_DETAIL_POSIX_CLOSE_OUT_HPP
0012
0013 #include <boost/process/detail/used_handles.hpp>
0014 #include <boost/process/detail/posix/handler.hpp>
0015 #include <array>
0016
0017 namespace boost { namespace process { namespace detail { namespace posix {
0018
0019 template<int p1, int p2>
0020 struct close_out : handler_base_ext
0021 {
0022     template <class Executor>
0023     inline void on_exec_setup(Executor &e) const;
0024
0025     std::array<int, 2> get_used_handles() {return {{p1 != -1 ? p1 : p2, p2 != -1 ? p2 : p1}};}
0026 };
0027
0028 template<>
0029 template<typename Executor>
0030 void close_out<1,-1>::on_exec_setup(Executor &e) const
0031 {
0032     if (::close(STDOUT_FILENO) == -1)
0033         e.set_error(::boost::process::detail::get_last_error(), "close() failed");
0034
0035 }
0036
0037 template<>
0038 template<typename Executor>
0039 void close_out<2,-1>::on_exec_setup(Executor &e) const
0040 {
0041     if (::close(STDERR_FILENO) == -1)
0042         e.set_error(::boost::process::detail::get_last_error(), "close() failed");
0043 }
0044
0045 template<>
0046 template<typename Executor>
0047 void close_out<1,2>::on_exec_setup(Executor &e) const
0048 {
0049     if (::close(STDOUT_FILENO) == -1)
0050         e.set_error(::boost::process::detail::get_last_error(), "close() failed");
0051
0052     if (::close(STDERR_FILENO) == -1)
0053         e.set_error(::boost::process::detail::get_last_error(), "close() failed");
0054 }
0055
0056 }}}}
0057
0058 #endif