/usr/include/asio/ip/host_name.hpp is in libasio-dev 1.4.1-3ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// host_name.hpp
// ~~~~~~~~~~~~~
//
// Copyright (c) 2003-2008 Christopher M. Kohlhoff (chris at kohlhoff dot com)
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#ifndef ASIO_IP_HOST_NAME_HPP
#define ASIO_IP_HOST_NAME_HPP
#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
#include "asio/detail/push_options.hpp"
#include "asio/detail/push_options.hpp"
#include <string>
#include "asio/detail/pop_options.hpp"
#include "asio/error.hpp"
#include "asio/detail/socket_ops.hpp"
#include "asio/detail/throw_error.hpp"
namespace asio {
namespace ip {
/// Get the current host name.
std::string host_name();
/// Get the current host name.
std::string host_name(asio::error_code& ec);
inline std::string host_name()
{
char name[1024];
asio::error_code ec;
if (asio::detail::socket_ops::gethostname(name, sizeof(name), ec) != 0)
{
asio::detail::throw_error(ec);
return std::string();
}
return std::string(name);
}
inline std::string host_name(asio::error_code& ec)
{
char name[1024];
if (asio::detail::socket_ops::gethostname(name, sizeof(name), ec) != 0)
return std::string();
return std::string(name);
}
} // namespace ip
} // namespace asio
#include "asio/detail/pop_options.hpp"
#endif // ASIO_IP_HOST_NAME_HPP
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