Example3_LinuxOnly.cpp

#include <boost/asio.hpp>
#include <boost/shared_ptr.hpp>
#include <boost/array.hpp>
#include <boost/make_shared.hpp>
#include "asio_helper.hpp"

int main()
{
    namespace asio = boost::asio;
    asio::io_service io;

    // Turn off newline buffering
    ::termios term;
    ::tcgetattr( STDIN_FILENO, &term );
    term.c_lflag &= ~(ICANON);
    ::tcsetattr( STDIN_FILENO, TCSANOW, &term );

    asio::posix::stream_descriptor in( io, ::dup( STDIN_FILENO ) );
    asio::posix::stream_descriptor out( io, ::dup( STDOUT_FILENO ) );
    using namespace asio_helper::handlers;

    asio_helper::do_async(io,[&io,&in,&out](asio_helper::async_helper helper){

        // Declare the error_code we will be using
        boost::system::error_code ec;

        // Write the prompt
        std::tie(ec,std::ignore) = helper.await_async_write(out,asio::buffer( "Please type in your name: " ));
        

        // Prepare the buffer to receive no more than 10 characters
        const std::size_t bufferSize = 10;
        boost::asio::streambuf response( bufferSize );
        response.prepare( bufferSize );

        // Read until a newline
        std::tie(ec,std::ignore) = helper.await_async_read_until(in,response,'\n');
        
        
        if( ec )
        {
            // If the name is too long, print out a prompt
            if( ec == asio::error::not_found ) {

                std::tie(ec,std::ignore) = helper.await_async_write(out,asio::buffer( "\nYour name is too long, try a nickname\n" ));
                
            } 
            else {
                auto message = std::string("Error: ") + ec.message() + "\n" ;
                std::tie(ec,std::ignore) = helper.await_async_write(out,asio::buffer( message ));
                
            }
        }
        else
        {
            std::istream is( &response);
            std::string name;
            std::getline( is, name, '\n' );
            auto message = "Hello " + name + "!\n" ;
            helper.await_async_write(out,asio::buffer( message ));
            
        }
    });

    io.run();
}