text: // Copyright (c) 2014-2017, The Monero Project
  // 
  // All rights reserved.
  // 
  // Redistribution and use in source and binary forms, with or without modification, are
  // permitted provided that the following conditions are met:
  // 
  // 1. Redistributions of source code must retain the above copyright notice, this list of
  //    conditions and the following disclaimer.
  // 
  // 2. Redistributions in binary form must reproduce the above copyright notice, this list
  //    of conditions and the following disclaimer in the documentation and/or other
  //    materials provided with the distribution.
  // 
  // 3. Neither the name of the copyright holder nor the names of its contributors may be
  //    used to endorse or promote products derived from this software without specific
  //    prior written permission.
  // 
  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
  // EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  // MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
  // THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  // STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
  // THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  #pragma once
  
  #include "common/scoped_message_writer.h"
  #include "common/util.h"
  #include "daemonizer/posix_fork.h"
  
  #include <boost/filesystem/operations.hpp>
  #include <boost/filesystem/path.hpp>
  
  namespace daemonizer
  {
    namespace
    {
      const command_line::arg_descriptor<bool> arg_detach = {
        "detach"
      , "Run as daemon"
      };
      const command_line::arg_descriptor<bool> arg_non_interactive = {
        "non-interactive"
      , "Run non-interactive"
      };
    }
  
    inline void init_options(
        boost::program_options::options_description & hidden_options
      , boost::program_options::options_description & normal_options
      )
    {
      command_line::add_arg(normal_options, arg_detach);
      command_line::add_arg(normal_options, arg_non_interactive);
    }
  
    inline boost::filesystem::path get_default_data_dir()
    {
      return boost::filesystem::absolute(tools::get_default_data_dir());
    }
  
    inline boost::filesystem::path get_relative_path_base(
        boost::program_options::variables_map const & vm
      )
    {
      return boost::filesystem::current_path();
    }
  
    template <typename T_executor>
    inline bool daemonize(
        int argc, char const * argv[]
      , T_executor && executor // universal ref
      , boost::program_options::variables_map const & vm
      )
    {
      if (command_line::has_arg(vm, arg_detach))
      {
        tools::success_msg_writer() << "Forking to background...";
        posix::fork();
        auto daemon = executor.create_daemon(vm);
        return daemon.run();
      }
      else if (command_line::has_arg(vm, arg_non_interactive))
      {
        return executor.run_non_interactive(vm);
      }
      else
      {
        //LOG_PRINT_L0("Swapcoinz '" << MONERO_RELEASE_NAME << "' (v" << MONERO_VERSION_FULL);
        return executor.run_interactive(vm);
      }
    }
  }
  