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//
// blocking_file_copy.cpp
// ~~~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2024 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)
//
#include <iostream>
#include "asio.hpp"
#if defined(ASIO_HAS_FILE)
int main(int argc, char* argv[])
{
try
{
if (argc != 3)
{
std::cerr << "Usage: blocking_file_copy <from> <to>\n";
return 1;
}
asio::io_context io_context;
asio::stream_file from_file(io_context, argv[1],
asio::stream_file::read_only);
asio::stream_file to_file(io_context, argv[2],
asio::stream_file::write_only
| asio::stream_file::create
| asio::stream_file::truncate);
char data[4096];
std::error_code error;
for (;;)
{
std::size_t n = from_file.read_some(asio::buffer(data), error);
if (error)
break;
asio::write(to_file, asio::buffer(data, n), error);
if (error)
break;
}
if (error && error != asio::error::eof)
{
std::cerr << "Error copying file: " << error.message() << "\n";
return 1;
}
}
catch (std::exception& e)
{
std::cerr << "Exception: " << e.what() << "\n";
return 1;
}
return 0;
}
#else // defined(ASIO_HAS_FILE)
int main() {}
#endif // defined(ASIO_HAS_FILE)
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