// // 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 #include "asio.hpp" #if defined(ASIO_HAS_FILE) int main(int argc, char* argv[]) { try { if (argc != 3) { std::cerr << "Usage: blocking_file_copy \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)