1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
|
//===----------------------------------------------------------------------===//
//
// 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, c++11, c++14
// REQUIRES: long_tests
// UNSUPPORTED: no-filesystem
// UNSUPPORTED: availability-filesystem-missing
// <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 <cassert>
#include <cstdio>
#include <string>
#include "test_macros.h"
#include "filesystem_test_helper.h"
namespace fs = std::filesystem;
using namespace fs;
// 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.
static void large_file() {
using namespace fs;
constexpr std::uintmax_t sendfile_size_limit = 2147479552ull;
constexpr std::uintmax_t additional_size = 1024;
constexpr std::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) {
return;
}
// 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");
assert(outf != nullptr);
std::fputs(additional_data.c_str(), outf);
std::fclose(outf);
}
assert(file_size(source) == test_file_size);
const path dest = env.make_env_path("dest");
std::error_code ec = GetTestEC();
assert(copy_file(source, dest, ec));
assert(!ec);
assert(is_regular_file(dest));
assert(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");
assert(dest_file != nullptr);
assert(std::fseek(dest_file, sendfile_size_limit, SEEK_SET) == 0);
assert(std::fread(&out_data[0], sizeof(out_data[0]), additional_size, dest_file) == additional_size);
std::fclose(dest_file);
}
assert(out_data.size() == additional_data.size());
assert(out_data == additional_data);
}
int main(int, char**) {
large_file();
return 0;
}
|
