整理

include/boost/process/v1/detail/posix/file_in.hpp

@@ -0,0 +1,46 @@
+// 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)
+
+#ifndef BOOST_PROCESS_DETAIL_POSIX_FILE_IN_HPP
+#define BOOST_PROCESS_DETAIL_POSIX_FILE_IN_HPP
+
+#include <boost/process/v1/pipe.hpp>
+#include <boost/process/v1/detail/posix/handler.hpp>
+#include <boost/process/v1/detail/posix/file_descriptor.hpp>
+#include <boost/process/v1/detail/used_handles.hpp>
+#include <cstdio>
+#include <unistd.h>
+
+namespace boost { namespace process { BOOST_PROCESS_V1_INLINE namespace v1 { namespace detail { namespace posix {
+
+struct file_in : handler_base_ext, ::boost::process::v1::detail::uses_handles
+{
+    file_descriptor file;
+    int handle = file.handle();
+
+    std::array<int, 2> get_used_handles()
+    {
+        return {{STDIN_FILENO, handle}};
+    }
+
+    template<typename T>
+    file_in(T&& t) : file(std::forward<T>(t)) {}
+    file_in(FILE * f) : handle(fileno(f)) {}
+
+    template <class WindowsExecutor>
+    void on_exec_setup(WindowsExecutor &e) const
+    {
+        if (::dup2(handle, STDIN_FILENO) == -1)
+             e.set_error(::boost::process::v1::detail::get_last_error(), "dup2() failed");
+    }
+};
+
+}}}}}
+
+#endif