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