[PATCH] libstdc++: fs: rtems subdir renaming

[PATCH] libstdc++: fs: rtems subdir renaming

[Alexandre Oliva]

RTEMS's implementation of rename(), at least on a temporary RAM
filesystem, allows a subdir to be moved into itself, but prevents a
dir from being renamed (in?)to an existing directory.  Adjust the
expectations of filesystem rename tests.

Regstrapped on x86_64-linux-gnu, also tested with a cross to
aarch64-rtems6.  Ok to install?


for  libstdc++-v3/ChangeLog

	* testsuite/27_io/filesystem/operations/rename.cc [__rtems__]
	(test_directories): Skip attempt to rename into itself, or to
	an existing directory.
	* testsuite/27_io/filesystem/operations/rename.cc [__rtems__]
	(test_directories): Likewise.
---
 .../27_io/filesystem/operations/rename.cc          |    6 +++++-
 .../experimental/filesystem/operations/rename.cc   |   11 ++++++++++-
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/libstdc++-v3/testsuite/27_io/filesystem/operations/rename.cc b/libstdc++-v3/testsuite/27_io/filesystem/operations/rename.cc
index 2fb2068dfd3c5..cf5d543b816c2 100644
--- a/libstdc++-v3/testsuite/27_io/filesystem/operations/rename.cc
+++ b/libstdc++-v3/testsuite/27_io/filesystem/operations/rename.cc
@@ -125,11 +125,15 @@ test_directories()
   VERIFY( is_directory(dir/"subdir2") );
   VERIFY( !exists(dir/"subdir") );
 
+#ifdef __rtems__
+  // Can rename a directory to a sub-directory of itself?!?
+#else
   // Cannot rename a directory to a sub-directory of itself.
   fs::rename(dir/"subdir2", dir/"subdir2/subsubdir", ec);
   VERIFY( ec );
   VERIFY( is_directory(dir/"subdir2") );
   VERIFY( !exists(dir/"subdir2"/"subsubdir") );
+#endif
 
   // Cannot rename a file to the name of an existing directory.
   ec.clear();
@@ -155,7 +159,7 @@ test_directories()
   VERIFY( is_directory(dir/"subdir2") );
   VERIFY( is_regular_file(dir/"subdir2/file") );
 
-#if defined(__MINGW32__) || defined(__MINGW64__)
+#if defined(__MINGW32__) || defined(__MINGW64__) || defined(__rtems__)
   // Cannot rename a directory to an existing directory
 #else
   // Can rename a non-empty directory to the name of an empty directory.
diff --git a/libstdc++-v3/testsuite/experimental/filesystem/operations/rename.cc b/libstdc++-v3/testsuite/experimental/filesystem/operations/rename.cc
index d2175652a79a8..1ef386fe73ade 100644
--- a/libstdc++-v3/testsuite/experimental/filesystem/operations/rename.cc
+++ b/libstdc++-v3/testsuite/experimental/filesystem/operations/rename.cc
@@ -125,11 +125,15 @@ test_directories()
   VERIFY( is_directory(dir/"subdir2") );
   VERIFY( !exists(dir/"subdir") );
 
+#ifdef __rtems__
+  // Can rename a directory to a sub-directory of itself?!?
+#else
   // Cannot rename a directory to a sub-directory of itself.
   fs::rename(dir/"subdir2", dir/"subdir2/subsubdir", ec);
   VERIFY( ec );
   VERIFY( is_directory(dir/"subdir2") );
   VERIFY( !exists(dir/"subdir2"/"subsubdir") );
+#endif
 
   // Cannot rename a file to the name of an existing directory.
   ec.clear();
@@ -158,6 +162,9 @@ test_directories()
   VERIFY( is_directory(dir/"subdir2") );
   VERIFY( is_regular_file(dir/"subdir2/file") );
 
+#ifdef __rtems__
+  // Cannot rename a directory to an existing directory
+#else
   // Can rename a non-empty directory to the name of an empty directory.
   ec = bad_ec;
   fs::rename(dir/"subdir2", dir/"subdir", ec);
@@ -165,10 +172,12 @@ test_directories()
   VERIFY( is_directory(dir/"subdir") );
   VERIFY( !exists(dir/"subdir2") );
   VERIFY( is_regular_file(dir/"subdir/file") );
+#endif
+
   f2.path.clear();
+#endif
 
   f.path.clear();
-#endif
 
   fs::remove_all(dir, ec);
 }

-- 
Alexandre Oliva, happy hacker                https://FSFLA.org/blogs/lxo/
   Free Software Activist                       GNU Toolchain Engineer
Disinformation flourishes because many people care deeply about injustice
but very few check the facts.  Ask me about <https://stallmansupport.org>