[PATCH v2 1/2] ntdll: Allow renaming a file/directory to a different capitalization of itself.

[Gabriel Ivăncescu]

Renaming a file or directory from e.g. foobar to FooBar (or any other
caps-only change) should work and capitalize it, like on Windows, instead
of being a no-op.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=46203
Signed-off-by: Gabriel Ivăncescu 
---
 dlls/ntdll/file.c | 44 +++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 43 insertions(+), 1 deletion(-)

diff --git a/dlls/ntdll/file.c b/dlls/ntdll/file.c
index 5175e9d..378584d 100644
--- a/dlls/ntdll/file.c
+++ b/dlls/ntdll/file.c
@@ -2761,9 +2761,9 @@ NTSTATUS WINAPI NtSetInformationFile(HANDLE handle, PIO_STATUS_BLOCK io,
         if (len >= sizeof(FILE_RENAME_INFORMATION))
         {
             FILE_RENAME_INFORMATION *info = ptr;
+            ANSI_STRING unix_name, src_unix;
             UNICODE_STRING name_str;
             OBJECT_ATTRIBUTES attr;
-            ANSI_STRING unix_name;

name_str.Buffer = info->FileName;
             name_str.Length = info->FileNameLength;
@@ -2778,6 +2778,48 @@ NTSTATUS WINAPI NtSetInformationFile(HANDLE handle, PIO_STATUS_BLOCK io,
             if (io->u.Status != STATUS_SUCCESS && io->u.Status != STATUS_NO_SUCH_FILE)
                 break;

+            /* When it's renaming to the same file, preserve the case sensitivity of the last
+               component, so that renaming a\b\c\foobar to a\b\c\Foobar works correctly. */
+            if (io->u.Status != STATUS_NO_SUCH_FILE && !(server_get_unix_name(handle, &src_unix)))
+            {
+                if (src_unix.Length == unix_name.Length &&
+                    !memcmp(src_unix.Buffer, unix_name.Buffer, unix_name.Length))
+                {
+                    size_t nt_filename_len, pathlen;
+                    const WCHAR *nt_filename;
+                    char *tmp;
+                    INT maxsz;
+
+                    for (pathlen = name_str.Length / sizeof(WCHAR); pathlen; pathlen--)
+                        if (name_str.Buffer[pathlen - 1] == '\')
+                            break;
+
+                    nt_filename     = name_str.Buffer + pathlen;
+                    nt_filename_len = name_str.Length / sizeof(WCHAR) - pathlen;
+
+                    /* Build it from path + filename (the latter converted from nt_filename) */
+                    for (pathlen = unix_name.Length; pathlen; pathlen--)
+                        if (unix_name.Buffer[pathlen - 1] == '/')
+                            break;
+
+                    tmp = unix_name.Buffer;
+                    maxsz = pathlen + nt_filename_len * 3 + 1;
+                    if (unix_name.MaximumLength < maxsz)
+                        tmp = RtlReAllocateHeap(GetProcessHeap(), 0, tmp, maxsz);
+                    if (tmp)
+                    {
+                        unix_name.Buffer = tmp;
+                        unix_name.MaximumLength = maxsz;
+
+                        unix_name.Length = pathlen;
+                        unix_name.Length += ntdll_wcstoumbs(nt_filename, nt_filename_len,
+                                                            unix_name.Buffer + pathlen, maxsz - pathlen, TRUE);
+                        unix_name.Buffer[unix_name.Length] = '\0';
+                    }
+                }
+                RtlFreeAnsiString(&src_unix);
+            }
+
             SERVER_START_REQ( set_fd_name_info )
             {
                 req->handle   = wine_server_obj_handle( handle );

[PATCH v2 2/2] kernel32/tests: Test renaming a file/directory to a different capitalization of itself.

[Gabriel Ivăncescu]

Signed-off-by: Gabriel Ivăncescu 
---
 dlls/kernel32/tests/file.c | 40 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

diff --git a/dlls/kernel32/tests/file.c b/dlls/kernel32/tests/file.c
index 785bd60..d0799f4 100644
--- a/dlls/kernel32/tests/file.c
+++ b/dlls/kernel32/tests/file.c
@@ -1906,6 +1906,7 @@ static void test_MoveFileA(void)
     char tempdir[MAX_PATH];
     char source[MAX_PATH], dest[MAX_PATH];
     static const char prefix[] = "pfx";
+    WIN32_FIND_DATAA find_data;
     HANDLE hfile;
     HANDLE hmapfile;
     DWORD ret;
@@ -1975,9 +1976,48 @@ static void test_MoveFileA(void)
     ok(ret, "MoveFileA: failed, error %d\n", GetLastError());

lstrcatA(tempdir, "Remove Me");
+
+    /* test renaming a file "Remove Me" to itself but in lowercase "me" */
+    lstrcpyA(source, tempdir);
+    tempdir[lstrlenA(tempdir) - 2] = 'm';
+
+    hfile = CreateFileA(source, GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, CREATE_ALWAYS, 0, 0);
+    ok(hfile != INVALID_HANDLE_VALUE, "failed to create %s\n", source);
+    CloseHandle(hfile);
+
+    ret = MoveFileA(source, tempdir);
+    ok(ret, "MoveFileA: failed, error %d\n", GetLastError());
+
+    hfile = FindFirstFileA(tempdir, &find_data);
+    ok(hfile != INVALID_HANDLE_VALUE, "FindFirstFileA: failed, error %d\n", GetLastError());
+    if (hfile != INVALID_HANDLE_VALUE)
+    {
+        ok(!lstrcmpA(strrchr(tempdir, '\') + 1, find_data.cFileName),
+           "MoveFile failed to change caps on same file: got %s\n", find_data.cFileName);
+    }
+    CloseHandle(hfile);
+
+    ret = DeleteFileA(tempdir);
+    ok(ret, "DeleteFileA: error %d\n", GetLastError());
+
+    /* now test a directory from "Remove me" to uppercase "Me" */
     ret = CreateDirectoryA(tempdir, NULL);
     ok(ret == TRUE, "CreateDirectoryA failed\n");

+    lstrcpyA(source, tempdir);
+    tempdir[lstrlenA(tempdir) - 2] = 'M';
+    ret = MoveFileA(source, tempdir);
+    ok(ret, "MoveFileA: failed, error %d\n", GetLastError());
+
+    hfile = FindFirstFileA(tempdir, &find_data);
+    ok(hfile != INVALID_HANDLE_VALUE, "FindFirstFileA: failed, error %d\n", GetLastError());
+    if (hfile != INVALID_HANDLE_VALUE)
+    {
+        ok(!lstrcmpA(strrchr(tempdir, '\') + 1, find_data.cFileName),
+           "MoveFile failed to change caps on same directory: got %s\n", find_data.cFileName);
+    }
+    CloseHandle(hfile);
+
     lstrcpyA(source, dest);
     lstrcpyA(dest, tempdir);
     lstrcatA(dest, "\wild?.*");