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 // Copyright (c) 2016 Klemens D. Morgenstern
7 //
8 // Distributed under the Boost Software License, Version 1.0. (See accompanying
9 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
10
11 #ifndef BOOST_PROCESS_POSIX_FILE_OUT_HPP
12 #define BOOST_PROCESS_POSIX_FILE_OUT_HPP
13
14 #include <boost/process/detail/posix/handler.hpp>
15 #include <boost/process/detail/posix/file_descriptor.hpp>
16 #include <boost/process/detail/used_handles.hpp>
17 #include <unistd.h>
18
19 namespace boost { namespace process { namespace detail { namespace posix {
20
21 template<int p1, int p2>
22 struct file_out : handler_base_ext, ::boost::process::detail::uses_handles
23 {
24 file_descriptor file;
25 int handle = file.handle();
26
27 template<typename T>
file_outboost::process::detail::posix::file_out28 file_out(T&& t) : file(std::forward<T>(t), file_descriptor::write), handle(file.handle()) {}
file_outboost::process::detail::posix::file_out29 file_out(FILE * f) : handle(fileno(f)) {}
30
get_used_handlesboost::process::detail::posix::file_out31 std::array<int, 3> get_used_handles()
32 {
33 const auto pp1 = p1 != -1 ? p1 : p2;
34 const auto pp2 = p2 != -1 ? p2 : p1;
35
36 return {handle, pp1, pp2};
37 }
38
39 template <typename Executor>
40 void on_exec_setup(Executor &e) const;
41 };
42
43 template<>
44 template<typename Executor>
on_exec_setup(Executor & e) const45 void file_out<1,-1>::on_exec_setup(Executor &e) const
46 {
47 if (::dup2(handle, STDOUT_FILENO) == -1)
48 e.set_error(::boost::process::detail::get_last_error(), "dup2() failed");
49 }
50
51 template<>
52 template<typename Executor>
on_exec_setup(Executor & e) const53 void file_out<2,-1>::on_exec_setup(Executor &e) const
54 {
55 if (::dup2(handle, STDERR_FILENO) == -1)
56 e.set_error(::boost::process::detail::get_last_error(), "dup2() failed");
57 }
58
59 template<>
60 template<typename Executor>
on_exec_setup(Executor & e) const61 void file_out<1,2>::on_exec_setup(Executor &e) const
62 {
63 if (::dup2(handle, STDOUT_FILENO) == -1)
64 e.set_error(::boost::process::detail::get_last_error(), "dup2() failed");
65
66 if (::dup2(handle, STDERR_FILENO) == -1)
67 e.set_error(::boost::process::detail::get_last_error(), "dup2() failed");
68
69 }
70
71 }}}}
72
73 #endif
74