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From: Jonathan Wakely <redi@gcc.gnu.org> To: gcc-cvs@gcc.gnu.org, libstdc++-cvs@gcc.gnu.org Subject: [gcc r10-10833] libstdc++: Fix error reporting in filesystem::copy [PR99290] Date: Tue, 14 Jun 2022 19:20:22 +0000 (GMT) [thread overview] Message-ID: <20220614192022.3B67B385277B@sourceware.org> (raw) https://gcc.gnu.org/g:43cbff3da5a856d1b18a9ad33b337ab829af73ed commit r10-10833-g43cbff3da5a856d1b18a9ad33b337ab829af73ed Author: Jonathan Wakely <jwakely@redhat.com> Date: Thu Apr 28 13:06:31 2022 +0100 libstdc++: Fix error reporting in filesystem::copy [PR99290] The recursive calls to filesystem::copy should stop if any of them reports an error. libstdc++-v3/ChangeLog: PR libstdc++/99290 * src/c++17/fs_ops.cc (fs::copy): Pass error_code to directory_iterator constructor, and check on each iteration. * src/filesystem/ops.cc (fs::copy): Likewise. * testsuite/27_io/filesystem/operations/copy.cc: Check for errors during recursion. * testsuite/experimental/filesystem/operations/copy.cc: Likewise. (cherry picked from commit 4e117418fb71f508c479e0144500f4da9cc92520) Diff: --- libstdc++-v3/src/c++17/fs_ops.cc | 8 ++++-- libstdc++-v3/src/filesystem/ops.cc | 8 ++++-- .../testsuite/27_io/filesystem/operations/copy.cc | 29 ++++++++++++++++++++++ .../experimental/filesystem/operations/copy.cc | 29 ++++++++++++++++++++++ 4 files changed, 70 insertions(+), 4 deletions(-) diff --git a/libstdc++-v3/src/c++17/fs_ops.cc b/libstdc++-v3/src/c++17/fs_ops.cc index 008195c2d31..5231f67561e 100644 --- a/libstdc++-v3/src/c++17/fs_ops.cc +++ b/libstdc++-v3/src/c++17/fs_ops.cc @@ -404,8 +404,12 @@ fs::copy(const path& from, const path& to, copy_options options, // set an unused bit in options to disable further recursion if (!is_set(options, copy_options::recursive)) options |= static_cast<copy_options>(4096); - for (const directory_entry& x : directory_iterator(from)) - copy(x.path(), to/x.path().filename(), options, ec); + for (const directory_entry& x : directory_iterator(from, ec)) + { + copy(x.path(), to/x.path().filename(), options, ec); + if (ec) + return; + } } // _GLIBCXX_RESOLVE_LIB_DEFECTS // 2683. filesystem::copy() says "no effects" diff --git a/libstdc++-v3/src/filesystem/ops.cc b/libstdc++-v3/src/filesystem/ops.cc index 321eb3a5cba..e7b145f8d79 100644 --- a/libstdc++-v3/src/filesystem/ops.cc +++ b/libstdc++-v3/src/filesystem/ops.cc @@ -344,8 +344,12 @@ fs::copy(const path& from, const path& to, copy_options options, // set an unused bit in options to disable further recursion if (!is_set(options, copy_options::recursive)) options |= static_cast<copy_options>(4096); - for (const directory_entry& x : directory_iterator(from)) - copy(x.path(), to/x.path().filename(), options, ec); + for (const directory_entry& x : directory_iterator(from, ec)) + { + copy(x.path(), to/x.path().filename(), options, ec); + if (ec) + return; + } } // _GLIBCXX_RESOLVE_LIB_DEFECTS // 2683. filesystem::copy() says "no effects" diff --git a/libstdc++-v3/testsuite/27_io/filesystem/operations/copy.cc b/libstdc++-v3/testsuite/27_io/filesystem/operations/copy.cc index f7aac8a302f..cbd8c8ea03e 100644 --- a/libstdc++-v3/testsuite/27_io/filesystem/operations/copy.cc +++ b/libstdc++-v3/testsuite/27_io/filesystem/operations/copy.cc @@ -194,6 +194,34 @@ test05() VERIFY( !ec ); // Previous value should be cleared (LWG 2683) } +void +test_pr99290() +{ + auto dir = __gnu_test::nonexistent_path(); + auto source = dir/"source"; + auto dest = dir/"dest"; + create_directories(source/"emptydir"); + create_directories(dest/"emptydir"); + std::ofstream{source/"file"} << 'a'; + std::ofstream{dest/"file"} << 'b'; + // PR libstdc++/99290 + // std::filesystem::copy does not always report errors for recursion + std::error_code ec; + copy(source, dest, ec); + VERIFY( ec == std::errc::file_exists ); + +#if __cpp_exceptions + try { + copy(source, dest); + VERIFY( false ); + } catch (const fs::filesystem_error& e) { + VERIFY( e.code() == std::errc::file_exists ); + } +#endif + + remove_all(dir); +} + int main() { @@ -202,4 +230,5 @@ main() test03(); test04(); test05(); + test_pr99290(); } diff --git a/libstdc++-v3/testsuite/experimental/filesystem/operations/copy.cc b/libstdc++-v3/testsuite/experimental/filesystem/operations/copy.cc index e1e6d1dcc15..75f7e0d8297 100644 --- a/libstdc++-v3/testsuite/experimental/filesystem/operations/copy.cc +++ b/libstdc++-v3/testsuite/experimental/filesystem/operations/copy.cc @@ -190,6 +190,34 @@ test05() VERIFY( !ec ); // Previous value should be cleared (LWG 2683) } +void +test_pr99290() +{ + auto dir = __gnu_test::nonexistent_path(); + auto source = dir/"source"; + auto dest = dir/"dest"; + create_directories(source/"emptydir"); + create_directories(dest/"emptydir"); + std::ofstream{source/"file"} << 'a'; + std::ofstream{dest/"file"} << 'b'; + // PR libstdc++/99290 + // std::filesystem::copy does not always report errors for recursion + std::error_code ec; + copy(source, dest, ec); + VERIFY( ec == std::errc::file_exists ); + +#if __cpp_exceptions + try { + copy(source, dest); + VERIFY( false ); + } catch (const fs::filesystem_error& e) { + VERIFY( e.code() == std::errc::file_exists ); + } +#endif + + remove_all(dir); +} + int main() { @@ -198,4 +226,5 @@ main() test03(); test04(); test05(); + test_pr99290(); }
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