#include <boost/asio.hpp>
#include <boost/thread.hpp>
#include <string>
#include <iostream>

#include <unistd.h>

const std::string socket_path = "/tmp/sok";
typedef boost::asio::local::stream_protocol::socket socket_t;
typedef socket_t* socket_ptr_t; // do not destroy connected sockets, so they remain connected

boost::asio::io_service io;
boost::asio::io_service::work io_work(io);
boost::asio::local::stream_protocol::acceptor acceptor(io);

void start_server()
{
    // just listen, do not accept connections
    ::unlink(socket_path.c_str());
    acceptor.open(boost::asio::local::stream_protocol());
    acceptor.bind(boost::asio::local::stream_protocol::endpoint(socket_path));
    acceptor.listen();
}

void handle_connect(socket_ptr_t sp, const boost::system::error_code& ec)
{
    if (!ec) {
        // successful connect, try write()
        boost::system::error_code wec;
        const size_t w = boost::asio::write(*sp, boost::asio::buffer("a",1), wec);
        if (wec) {
            std::cerr << "write error: " << wec.message() << std::endl;
            _exit(1);
        }
    }
}

int main()
{
    boost::thread io_run_thr(boost::bind(&boost::asio::io_service::run, &io));
    start_server();
    while (1) {
        socket_ptr_t sp(new socket_t(io));
        sp->async_connect(
            boost::asio::local::stream_protocol::endpoint(socket_path),
            boost::bind(&handle_connect, sp, boost::asio::placeholders::error)
        );
    }
}