ceph/src/boost/boost/process/detail/posix/null_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_PIPE_OUT_HPP
  12 #define BOOST_PROCESS_POSIX_PIPE_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 null_out : handler_base_ext
  22 {
  23     file_descriptor sink{"/dev/null", file_descriptor::write};
  24
  25     template <typename Executor>
  26     void on_exec_setup(Executor &e) const;
  27 };
  28
  29 template<>
  30 template<typename Executor>
  31 void null_out<1,-1>::on_exec_setup(Executor &e) const
  32 {
  33     if (::dup2(sink.handle(), STDOUT_FILENO) == -1)
  34          e.set_error(::boost::process::detail::get_last_error(), "dup2() failed");
  35 }
  36
  37 template<>
  38 template<typename Executor>
  39 void null_out<2,-1>::on_exec_setup(Executor &e) const
  40 {
  41     if (::dup2(sink.handle(), STDERR_FILENO) == -1)
  42          e.set_error(::boost::process::detail::get_last_error(), "dup2() failed");
  43 }
  44
  45 template<>
  46 template<typename Executor>
  47 void null_out<1,2>::on_exec_setup(Executor &e) const
  48 {
  49     if (::dup2(sink.handle(), STDOUT_FILENO) == -1)
  50          e.set_error(::boost::process::detail::get_last_error(), "dup2() failed");
  51
  52     if (::dup2(sink.handle(), STDERR_FILENO) == -1)
  53          e.set_error(::boost::process::detail::get_last_error(), "dup2() failed");
  54 }
  55
  56 }}}}
  57
  58 #endif