1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 2020, 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.haxx.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 ***************************************************************************/
22
23 #include "rename.h"
24
25 #include "curl_setup.h"
26
27 #if (!defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_COOKIES)) || \
28 defined(USE_ALTSVC)
29
30 #include "curl_multibyte.h"
31 #include "timeval.h"
32
33 /* The last 3 #include files should be in this order */
34 #include "curl_printf.h"
35 #include "curl_memory.h"
36 #include "memdebug.h"
37
38 /* return 0 on success, 1 on error */
Curl_rename(const char * oldpath,const char * newpath)39 int Curl_rename(const char *oldpath, const char *newpath)
40 {
41 #ifdef WIN32
42 /* rename() on Windows doesn't overwrite, so we can't use it here.
43 MoveFileEx() will overwrite and is usually atomic, however it fails
44 when there are open handles to the file. */
45 const int max_wait_ms = 1000;
46 struct curltime start = Curl_now();
47 TCHAR *tchar_oldpath = curlx_convert_UTF8_to_tchar((char *)oldpath);
48 TCHAR *tchar_newpath = curlx_convert_UTF8_to_tchar((char *)newpath);
49 for(;;) {
50 timediff_t diff;
51 if(MoveFileEx(tchar_oldpath, tchar_newpath, MOVEFILE_REPLACE_EXISTING)) {
52 curlx_unicodefree(tchar_oldpath);
53 curlx_unicodefree(tchar_newpath);
54 break;
55 }
56 diff = Curl_timediff(Curl_now(), start);
57 if(diff < 0 || diff > max_wait_ms) {
58 curlx_unicodefree(tchar_oldpath);
59 curlx_unicodefree(tchar_newpath);
60 return 1;
61 }
62 Sleep(1);
63 }
64 #else
65 if(rename(oldpath, newpath))
66 return 1;
67 #endif
68 return 0;
69 }
70
71 #endif
72