/usr/include/asio/detail/signal_init.hpp is in libasio-dev 1:1.10.8-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// detail/signal_init.hpp
// ~~~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2016 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_DETAIL_SIGNAL_INIT_HPP
#define ASIO_DETAIL_SIGNAL_INIT_HPP
#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
#include "asio/detail/config.hpp"
#if !defined(ASIO_WINDOWS) && !defined(__CYGWIN__)
#include <csignal>
#include "asio/detail/push_options.hpp"
namespace asio {
namespace detail {
template <int Signal = SIGPIPE>
class signal_init
{
public:
// Constructor.
signal_init()
{
std::signal(Signal, SIG_IGN);
}
};
} // namespace detail
} // namespace asio
#include "asio/detail/pop_options.hpp"
#endif // !defined(ASIO_WINDOWS) && !defined(__CYGWIN__)
#endif // ASIO_DETAIL_SIGNAL_INIT_HPP
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