From a175314c3e5827eb193872241446f2f8f5c9d33c Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sat, 4 May 2024 20:07:14 +0200
Subject: Adding upstream version 1:10.5.12.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 mysys/my_rename.c | 118 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 118 insertions(+)
 create mode 100644 mysys/my_rename.c

(limited to 'mysys/my_rename.c')

diff --git a/mysys/my_rename.c b/mysys/my_rename.c
new file mode 100644
index 00000000..7b31e83b
--- /dev/null
+++ b/mysys/my_rename.c
@@ -0,0 +1,118 @@
+/* Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; version 2 of the License.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335  USA */
+
+#include "mysys_priv.h"
+#include <my_dir.h>
+#include "mysys_err.h"
+#include "m_string.h"
+#undef my_rename
+
+
+#ifdef _WIN32
+
+#define RENAME_MAX_RETRIES 50
+
+/*
+  On Windows, bad 3rd party programs (backup or anitivirus, or something else)
+  can have file open with a sharing mode incompatible with renaming, i.e they
+  won't use FILE_SHARE_DELETE when opening file.
+
+  The following function will do a couple of retries, in case MoveFileEx returns
+  ERROR_SHARING_VIOLATION.
+*/
+static BOOL win_rename_with_retries(const char *from, const char *to)
+{
+#ifndef DBUG_OFF
+  FILE *fp = NULL;
+  DBUG_EXECUTE_IF("rename_sharing_violation",
+    {
+    fp= fopen(from, "r");
+    DBUG_ASSERT(fp);
+    }
+  );
+#endif
+
+  for (int retry= RENAME_MAX_RETRIES; retry--;)
+  {
+    DWORD ret = MoveFileEx(from, to,
+                         MOVEFILE_COPY_ALLOWED | MOVEFILE_REPLACE_EXISTING);
+
+    DBUG_ASSERT(fp == NULL || (ret == FALSE && GetLastError() == ERROR_SHARING_VIOLATION));
+
+    if (!ret && (GetLastError() == ERROR_SHARING_VIOLATION))
+    {
+#ifndef DBUG_OFF
+       /*
+        If error was injected in via DBUG_EXECUTE_IF, close the file
+        that is causing ERROR_SHARING_VIOLATION, so that retry succeeds.
+       */
+        if (fp)
+        {
+          fclose(fp);
+          fp= NULL;
+        }
+#endif
+
+      Sleep(10);
+    }
+    else
+      return ret;
+  }
+  return FALSE;
+}
+#endif
+
+	/* On unix rename deletes to file if it exists */
+int my_rename(const char *from, const char *to, myf MyFlags)
+{
+  int error = 0;
+  DBUG_ENTER("my_rename");
+  DBUG_PRINT("my",("from %s to %s MyFlags %lu", from, to, MyFlags));
+
+#if defined(__WIN__)
+  if (!win_rename_with_retries(from, to))
+  {
+    my_osmaperr(GetLastError());
+#elif defined(HAVE_RENAME)
+  if (rename(from,to))
+  {
+#else
+  if (link(from, to) || unlink(from))
+  {
+#endif
+    if (errno == ENOENT && !access(from, F_OK))
+      my_errno= ENOTDIR;
+    else
+      my_errno= errno;
+    error = -1;
+    if (MyFlags & (MY_FAE+MY_WME))
+      my_error(EE_LINK, MYF(ME_BELL),from,to,my_errno);
+  }
+  else if (MyFlags & MY_SYNC_DIR)
+  {
+#ifdef NEED_EXPLICIT_SYNC_DIR
+    /* do only the needed amount of syncs: */
+    char dir_from[FN_REFLEN], dir_to[FN_REFLEN];
+    size_t dir_from_length, dir_to_length;
+    dirname_part(dir_from, from, &dir_from_length);
+    dirname_part(dir_to, to, &dir_to_length);
+    if (my_sync_dir(dir_from, MyFlags) ||
+        (strcmp(dir_from, dir_to) &&
+         my_sync_dir(dir_to, MyFlags)))
+      error= -1;
+#endif
+  }
+  DBUG_RETURN(error);
+} /* my_rename */
-- 
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