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_POSIX_PIPE_IN_HPP
11 #define BOOST_PROCESS_POSIX_PIPE_IN_HPP
12 
13 #include <boost/process/pipe.hpp>
14 #include <boost/process/detail/posix/handler.hpp>
15 #include <unistd.h>
16 #include <boost/process/detail/used_handles.hpp>
17 #include <array>
18 
19 namespace boost { namespace process { namespace detail { namespace posix {
20 
21 struct pipe_in : handler_base_ext, ::boost::process::detail::uses_handles
22 {
23     int source;
24     int sink; //opposite end
25 
pipe_inboost::process::detail::posix::pipe_in26     pipe_in(int sink, int source) : source(source), sink(sink) {}
27 
get_used_handlesboost::process::detail::posix::pipe_in28     std::array<int, 3> get_used_handles()
29     {
30         return {{STDIN_FILENO, source, sink}};
31     }
32 
33 
34     template<typename T>
pipe_inboost::process::detail::posix::pipe_in35     pipe_in(T & p) : source(p.native_source()), sink(p.native_sink())
36     {
37         p.assign_source(-1);
38     }
39 
40     template<typename Executor>
on_errorboost::process::detail::posix::pipe_in41     void on_error(Executor &, const std::error_code &) const
42     {
43         ::close(source);
44     }
45 
46     template<typename Executor>
on_successboost::process::detail::posix::pipe_in47     void on_success(Executor &) const
48     {
49         ::close(source);
50     }
51 
52     template <class Executor>
on_exec_setupboost::process::detail::posix::pipe_in53     void on_exec_setup(Executor &e) const
54     {
55         if (::dup2(source, STDIN_FILENO) == -1)
56              e.set_error(::boost::process::detail::get_last_error(), "dup2() failed");
57         if (source != STDIN_FILENO)
58             ::close(source);
59 
60         ::close(sink);
61     }
62 
63 };
64 
65 class async_pipe;
66 
67 struct async_pipe_in : public pipe_in
68 {
69     async_pipe &pipe;
70 
71     template<typename AsyncPipe>
async_pipe_inboost::process::detail::posix::async_pipe_in72     async_pipe_in(AsyncPipe & p) : pipe_in(p.native_sink(), p.native_source()), pipe(p)
73     {
74     }
75 
76     template<typename Pipe, typename Executor>
closeboost::process::detail::posix::async_pipe_in77     static void close(Pipe & pipe, Executor &)
78     {
79         boost::system::error_code ec;
80         std::move(pipe).source().close(ec);
81     }
82 
83     template<typename Executor>
on_errorboost::process::detail::posix::async_pipe_in84     void on_error(Executor & exec, const std::error_code &)
85     {
86         close(pipe, exec);
87     }
88 
89     template<typename Executor>
on_successboost::process::detail::posix::async_pipe_in90     void on_success(Executor &exec)
91     {
92         close(pipe, exec);
93     }
94 };
95 
96 }}}}
97 
98 #endif
99