| 1 | //===----------------------------------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | // UNSUPPORTED: c++03, c++11, c++14 |
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| 10 | // REQUIRES: linux |
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| 11 | // UNSUPPORTED: no-filesystem |
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| 12 | // XFAIL: no-localization |
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| 13 | // UNSUPPORTED: availability-filesystem-missing |
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| 14 | |
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| 15 | // <filesystem> |
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| 16 | |
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| 17 | // bool copy_file(const path& from, const path& to); |
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| 18 | // bool copy_file(const path& from, const path& to, error_code& ec) noexcept; |
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| 19 | // bool copy_file(const path& from, const path& to, copy_options options); |
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| 20 | // bool copy_file(const path& from, const path& to, copy_options options, |
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| 21 | // error_code& ec) noexcept; |
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| 22 | |
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| 23 | #include <cassert> |
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| 24 | #include <filesystem> |
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| 25 | #include <system_error> |
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| 26 | |
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| 27 | #include "test_macros.h" |
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| 28 | #include "filesystem_test_helper.h" |
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| 29 | |
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| 30 | namespace fs = std::filesystem; |
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| 31 | |
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| 32 | // Linux has various virtual filesystems such as /proc and /sys |
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| 33 | // where files may have no length (st_size == 0), but still contain data. |
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| 34 | // This is because the to-be-read data is usually generated ad-hoc by the reading syscall |
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| 35 | // These files can not be copied with kernel-side copies like copy_file_range or sendfile, |
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| 36 | // and must instead be copied via a traditional userspace read + write loop. |
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| 37 | int main(int, char** argv) { |
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| 38 | const fs::path procfile{"/proc/self/comm" }; |
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| 39 | assert(file_size(procfile) == 0); |
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| 40 | |
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| 41 | scoped_test_env env; |
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| 42 | std::error_code ec = GetTestEC(); |
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| 43 | |
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| 44 | const fs::path dest = env.make_env_path("dest" ); |
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| 45 | |
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| 46 | assert(copy_file(procfile, dest, ec)); |
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| 47 | assert(!ec); |
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| 48 | |
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| 49 | // /proc/self/comm contains the filename of the executable, plus a null terminator |
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| 50 | assert(file_size(dest) == fs::path(argv[0]).filename().string().size() + 1); |
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| 51 | |
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| 52 | return 0; |
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| 53 | } |
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| 54 | |
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