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Annotation of embedaddon/curl/lib/rename.c, revision 1.1.1.1

1.1       misho       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 "timeval.h"
                     31: 
                     32: /* The last 3 #include files should be in this order */
                     33: #include "curl_printf.h"
                     34: #include "curl_memory.h"
                     35: #include "memdebug.h"
                     36: 
                     37: /* return 0 on success, 1 on error */
                     38: int Curl_rename(const char *oldpath, const char *newpath)
                     39: {
                     40: #ifdef WIN32
                     41:   /* rename() on Windows doesn't overwrite, so we can't use it here.
                     42:      MoveFileExA() will overwrite and is usually atomic, however it fails
                     43:      when there are open handles to the file. */
                     44:   const int max_wait_ms = 1000;
                     45:   struct curltime start = Curl_now();
                     46:   for(;;) {
                     47:     timediff_t diff;
                     48:     if(MoveFileExA(oldpath, newpath, MOVEFILE_REPLACE_EXISTING))
                     49:       break;
                     50:     diff = Curl_timediff(Curl_now(), start);
                     51:     if(diff < 0 || diff > max_wait_ms)
                     52:       return 1;
                     53:     Sleep(1);
                     54:   }
                     55: #else
                     56:   if(rename(oldpath, newpath))
                     57:     return 1;
                     58: #endif
                     59:   return 0;
                     60: }
                     61: 
                     62: #endif