1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
9 *
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at https://curl.se/docs/copyright.html.
13 *
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 * SPDX-License-Identifier: curl
22 *
23 ***************************************************************************/
24
25 #include "rename.h"
26
27 #include "curl_setup.h"
28
29 #if (!defined(CURL_DISABLE_HTTP) || !defined(CURL_DISABLE_COOKIES)) || \
30 !defined(CURL_DISABLE_ALTSVC)
31
32 #include "curl_multibyte.h"
33 #include "timeval.h"
34
35 /* The last 3 #include files should be in this order */
36 #include "curl_printf.h"
37 #include "curl_memory.h"
38 #include "memdebug.h"
39
40 /* return 0 on success, 1 on error */
Curl_rename(const char * oldpath,const char * newpath)41 int Curl_rename(const char *oldpath, const char *newpath)
42 {
43 #ifdef _WIN32
44 /* rename() on Windows does not overwrite, so we cannot use it here.
45 MoveFileEx() will overwrite and is usually atomic, however it fails
46 when there are open handles to the file. */
47 const int max_wait_ms = 1000;
48 struct curltime start = Curl_now();
49 TCHAR *tchar_oldpath = curlx_convert_UTF8_to_tchar((char *)oldpath);
50 TCHAR *tchar_newpath = curlx_convert_UTF8_to_tchar((char *)newpath);
51 for(;;) {
52 timediff_t diff;
53 if(MoveFileEx(tchar_oldpath, tchar_newpath, MOVEFILE_REPLACE_EXISTING)) {
54 curlx_unicodefree(tchar_oldpath);
55 curlx_unicodefree(tchar_newpath);
56 break;
57 }
58 diff = Curl_timediff(Curl_now(), start);
59 if(diff < 0 || diff > max_wait_ms) {
60 curlx_unicodefree(tchar_oldpath);
61 curlx_unicodefree(tchar_newpath);
62 return 1;
63 }
64 Sleep(1);
65 }
66 #else
67 if(rename(oldpath, newpath))
68 return 1;
69 #endif
70 return 0;
71 }
72
73 #endif
74
