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* [gcc r12-8590] libstdc++: Fix experimental::filesystem::status on Windows [PR88881]
@ 2022-07-21 11:16 Jonathan Wakely
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From: Jonathan Wakely @ 2022-07-21 11:16 UTC (permalink / raw)
To: gcc-cvs, libstdc++-cvs
https://gcc.gnu.org/g:f3ff78e3db0fc18127dac4fe3eaf113d0c5ddd01
commit r12-8590-gf3ff78e3db0fc18127dac4fe3eaf113d0c5ddd01
Author: Jonathan Wakely <jwakely@redhat.com>
Date: Tue Jun 28 15:56:30 2022 +0100
libstdc++: Fix experimental::filesystem::status on Windows [PR88881]
Although the Filesystem TS isn't properly supported on Windows (unlike
the C++17 Filesystem lib), most tests do pass. Two of the failures are
due to PR 88881 which was only fixed for std::filesystem not the TS.
This applies the fix to the TS implementation too.
libstdc++-v3/ChangeLog:
PR libstdc++/88881
* src/filesystem/ops.cc (has_trailing_slash): New helper
function.
(fs::status): Strip trailing slashes.
(fs::symlink_status): Likewise.
* testsuite/experimental/filesystem/operations/temp_directory_path.cc:
Clean the environment before each test and use TMP instead of
TMPDIR so the test passes on Windows.
(cherry picked from commit 6c96b14a19a9e6c365eacc59868a866b99f9786d)
Diff:
---
libstdc++-v3/src/filesystem/ops.cc | 56 +++++++++++++++++++++-
.../filesystem/operations/temp_directory_path.cc | 6 ++-
2 files changed, 59 insertions(+), 3 deletions(-)
diff --git a/libstdc++-v3/src/filesystem/ops.cc b/libstdc++-v3/src/filesystem/ops.cc
index 98ddff5a66e..896a4918ace 100644
--- a/libstdc++-v3/src/filesystem/ops.cc
+++ b/libstdc++-v3/src/filesystem/ops.cc
@@ -1176,13 +1176,43 @@ fs::space(const path& p, error_code& ec) noexcept
return info;
}
+#if _GLIBCXX_FILESYSTEM_IS_WINDOWS
+static bool has_trailing_slash(const fs::path& p)
+{
+ wchar_t c = p.native().back();
+ return c == '/' || c == L'\\';
+}
+#endif
+
#ifdef _GLIBCXX_HAVE_SYS_STAT_H
fs::file_status
fs::status(const fs::path& p, error_code& ec) noexcept
{
file_status status;
+
+ auto str = p.c_str();
+
+#if _GLIBCXX_FILESYSTEM_IS_WINDOWS
+ // stat() fails if there's a trailing slash (PR 88881)
+ path p2;
+ if (p.has_relative_path() && has_trailing_slash(p))
+ {
+ __try
+ {
+ p2 = p.parent_path();
+ str = p2.c_str();
+ }
+ __catch(const bad_alloc&)
+ {
+ ec = std::make_error_code(std::errc::not_enough_memory);
+ return status;
+ }
+ str = p2.c_str();
+ }
+#endif
+
stat_type st;
- if (posix::stat(p.c_str(), &st))
+ if (posix::stat(str, &st))
{
int err = errno;
ec.assign(err, std::generic_category());
@@ -1205,8 +1235,30 @@ fs::file_status
fs::symlink_status(const fs::path& p, std::error_code& ec) noexcept
{
file_status status;
+
+ auto str = p.c_str();
+
+#if _GLIBCXX_FILESYSTEM_IS_WINDOWS
+ // stat() fails if there's a trailing slash (PR 88881)
+ path p2;
+ if (p.has_relative_path() && has_trailing_slash(p))
+ {
+ __try
+ {
+ p2 = p.parent_path();
+ str = p2.c_str();
+ }
+ __catch(const bad_alloc&)
+ {
+ ec = std::make_error_code(std::errc::not_enough_memory);
+ return status;
+ }
+ str = p2.c_str();
+ }
+#endif
+
stat_type st;
- if (posix::lstat(p.c_str(), &st))
+ if (posix::lstat(str, &st))
{
int err = errno;
ec.assign(err, std::generic_category());
diff --git a/libstdc++-v3/testsuite/experimental/filesystem/operations/temp_directory_path.cc b/libstdc++-v3/testsuite/experimental/filesystem/operations/temp_directory_path.cc
index 9e9cd44d460..c2945c90866 100644
--- a/libstdc++-v3/testsuite/experimental/filesystem/operations/temp_directory_path.cc
+++ b/libstdc++-v3/testsuite/experimental/filesystem/operations/temp_directory_path.cc
@@ -105,6 +105,8 @@ test03()
if (!__gnu_test::permissions_are_testable())
return;
+ clean_env();
+
auto p = __gnu_test::nonexistent_path();
create_directories(p/"tmp");
permissions(p, fs::perms::none);
@@ -129,8 +131,10 @@ test03()
void
test04()
{
+ clean_env();
+
__gnu_test::scoped_file f;
- set_env("TMPDIR", f.path.string());
+ set_env("TMP", f.path.string());
std::error_code ec;
auto r = fs::temp_directory_path(ec);
VERIFY( ec == std::make_error_code(std::errc::not_a_directory) );
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