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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03
// REQUIRES: long_tests
// <filesystem>
// bool copy_file(const path& from, const path& to);
// bool copy_file(const path& from, const path& to, error_code& ec) noexcept;
// bool copy_file(const path& from, const path& to, copy_options options);
// bool copy_file(const path& from, const path& to, copy_options options,
// error_code& ec) noexcept;
#include "filesystem_include.h"
#include <cassert>
#include <cstdio>
#include <string>
#include "test_macros.h"
#include "rapid-cxx-test.h"
#include "filesystem_test_helper.h"
using namespace fs;
TEST_SUITE(filesystem_copy_file_test_suite)
// This test is intended to test 'sendfile's 2gb limit for a single call, and
// to ensure that libc++ correctly copies files larger than that limit.
// However it requires allocating ~5GB of filesystem space. This might not
// be acceptable on all systems.
TEST_CASE(large_file) {
using namespace fs;
constexpr uintmax_t sendfile_size_limit = 2147479552ull;
constexpr uintmax_t additional_size = 1024;
constexpr uintmax_t test_file_size = sendfile_size_limit + additional_size;
static_assert(test_file_size > sendfile_size_limit, "");
scoped_test_env env;
// Check that we have more than sufficient room to create the files needed
// to perform the test.
if (space(env.test_root).available < 3 * test_file_size) {
TEST_UNSUPPORTED();
}
// Create a file right at the size limit. The file is full of '\0's.
const path source = env.create_file("source", sendfile_size_limit);
const std::string additional_data(additional_size, 'x');
// Append known data to the end of the source file.
{
std::FILE* outf = std::fopen(source.string().c_str(), "a");
TEST_REQUIRE(outf != nullptr);
std::fputs(additional_data.c_str(), outf);
std::fclose(outf);
}
TEST_REQUIRE(file_size(source) == test_file_size);
const path dest = env.make_env_path("dest");
std::error_code ec = GetTestEC();
TEST_CHECK(copy_file(source, dest, ec));
TEST_CHECK(!ec);
TEST_REQUIRE(is_regular_file(dest));
TEST_CHECK(file_size(dest) == test_file_size);
// Read the data from the end of the destination file, and ensure it matches
// the data at the end of the source file.
std::string out_data(additional_size, 'z');
{
std::FILE* dest_file = std::fopen(dest.string().c_str(), "rb");
TEST_REQUIRE(dest_file != nullptr);
TEST_REQUIRE(std::fseek(dest_file, sendfile_size_limit, SEEK_SET) == 0);
TEST_REQUIRE(std::fread(&out_data[0], sizeof(out_data[0]), additional_size, dest_file) == additional_size);
std::fclose(dest_file);
}
TEST_CHECK(out_data.size() == additional_data.size());
TEST_CHECK(out_data == additional_data);
}
TEST_SUITE_END()
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