1 // Copyright (c) 2006, 2007 Julio M. Merino Vidal
2 // Copyright (c) 2008 Ilya Sokolov, Boris Schaeling
3 // Copyright (c) 2009 Boris Schaeling
4 // Copyright (c) 2010 Felipe Tanus, Boris Schaeling
5 // Copyright (c) 2011, 2012 Jeff Flinn, Boris Schaeling
6 //
7 // Distributed under the Boost Software License, Version 1.0. (See accompanying
8 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
9 
10 #ifndef BOOST_PROCESS_DETAIL_POSIX_NULL_IN_HPP
11 #define BOOST_PROCESS_DETAIL_POSIX_NULL_IN_HPP
12 
13 #include <boost/process/pipe.hpp>
14 #include <boost/process/detail/posix/handler.hpp>
15 #include <boost/process/detail/posix/file_descriptor.hpp>
16 #include <unistd.h>
17 #include <boost/process/detail/used_handles.hpp>
18 #include <array>
19 
20 namespace boost { namespace process { namespace detail { namespace posix {
21 
22 struct null_in : handler_base_ext, ::boost::process::detail::uses_handles
23 {
24     file_descriptor source{"/dev/null", file_descriptor::read};
25 
get_used_handlesboost::process::detail::posix::null_in26     std::array<int, 2> get_used_handles()
27     {
28         return {{STDIN_FILENO, source.handle()}};
29     }
30 
31 
32 public:
33     template <class Executor>
on_exec_setupboost::process::detail::posix::null_in34     void on_exec_setup(Executor &e) const
35     {
36         if (::dup2(source.handle(), STDIN_FILENO) == -1)
37              e.set_error(::boost::process::detail::get_last_error(), "dup2() failed");
38     }
39 };
40 
41 }}}}
42 
43 #endif
44