ceph/src/boost/boost/process/detail/posix/file_out.hpp

   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
  17 #include <unistd.h>
  18 namespace boost { namespace process { namespace detail { namespace posix {
  19
  20 template<int p1, int p2>
  21 struct file_out : handler_base_ext
  22 {
  23     file_descriptor file;
  24     int handle = file.handle();
  25
  26     template<typename T>
  27     file_out(T&& t) : file(std::forward<T>(t), file_descriptor::write), handle(file.handle()) {}
  28     file_out(FILE * f) : handle(fileno(f)) {}
  29
  30
  31     template <typename Executor>
  32     void on_exec_setup(Executor &e) const;
  33 };
  34
  35 template<>
  36 template<typename Executor>
  37 void file_out<1,-1>::on_exec_setup(Executor &e) const
  38 {
  39     if (::dup2(handle, STDOUT_FILENO) == -1)
  40          e.set_error(::boost::process::detail::get_last_error(), "dup2() failed");
  41 }
  42
  43 template<>
  44 template<typename Executor>
  45 void file_out<2,-1>::on_exec_setup(Executor &e) const
  46 {
  47     if (::dup2(handle, STDERR_FILENO) == -1)
  48          e.set_error(::boost::process::detail::get_last_error(), "dup2() failed");
  49 }
  50
  51 template<>
  52 template<typename Executor>
  53 void file_out<1,2>::on_exec_setup(Executor &e) const
  54 {
  55     if (::dup2(handle, STDOUT_FILENO) == -1)
  56          e.set_error(::boost::process::detail::get_last_error(), "dup2() failed");
  57
  58     if (::dup2(handle, STDERR_FILENO) == -1)
  59          e.set_error(::boost::process::detail::get_last_error(), "dup2() failed");
  60
  61 }
  62
  63 }}}}
  64
  65 #endif