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    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