Mercurial > vim

comparison src/os_win32.c @ 2793:ee48b3da9d53 v7.3.172

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
updated for version 7.3.172 Problem: MS-Windows: rename() might delete the file if the name differs but it's actually the same file. Solution: Use the file handle to check if it's the same file. (Yukihiro Nakadaira)
author Bram Moolenaar <bram@vim.org>
date Thu, 05 May 2011 16:41:24 +0200
parents 3ea3dcbf2cd6
children 66f2d62271fe
comparison
equal deleted inserted replaced
2792:f8a458d9f368 2793:ee48b3da9d53
2643 * Return TRUE if file "fname" has more than one link. 2643 * Return TRUE if file "fname" has more than one link.
2644 */ 2644 */
2645 int 2645 int
2646 mch_is_linked(char_u *fname) 2646 mch_is_linked(char_u *fname)
2647 { 2647 {
2648 BY_HANDLE_FILE_INFORMATION info;
2649
2650 return win32_fileinfo(fname, &info) == FILEINFO_OK
2651 && info.nNumberOfLinks > 1;
2652 }
2653
2654 /*
2655 * Get the by-handle-file-information for "fname".
2656 * Returns FILEINFO_OK when OK.
2657 * returns FILEINFO_ENC_FAIL when enc_to_utf16() failed.
2658 * Returns FILEINFO_READ_FAIL when CreateFile() failed.
2659 * Returns FILEINFO_INFO_FAIL when GetFileInformationByHandle() failed.
2660 */
2661 int
2662 win32_fileinfo(char_u *fname, BY_HANDLE_FILE_INFORMATION *info)
2663 {
2648 HANDLE hFile; 2664 HANDLE hFile;
2649 int res = 0; 2665 int res = FILEINFO_READ_FAIL;
2650 BY_HANDLE_FILE_INFORMATION inf;
2651 #ifdef FEAT_MBYTE 2666 #ifdef FEAT_MBYTE
2652 WCHAR *wn = NULL; 2667 WCHAR *wn = NULL;
2653 2668
2654 if (enc_codepage >= 0 && (int)GetACP() != enc_codepage) 2669 if (enc_codepage >= 0 && (int)GetACP() != enc_codepage)
2670 {
2655 wn = enc_to_utf16(fname, NULL); 2671 wn = enc_to_utf16(fname, NULL);
2672 if (wn == NULL)
2673 res = FILEINFO_ENC_FAIL;
2674 }
2656 if (wn != NULL) 2675 if (wn != NULL)
2657 { 2676 {
2658 hFile = CreateFileW(wn, /* file name */ 2677 hFile = CreateFileW(wn, /* file name */
2659 GENERIC_READ, /* access mode */ 2678 GENERIC_READ, /* access mode */
2660 0, /* share mode */ 2679 FILE_SHARE_READ | FILE_SHARE_WRITE, /* share mode */
2661 NULL, /* security descriptor */ 2680 NULL, /* security descriptor */
2662 OPEN_EXISTING, /* creation disposition */ 2681 OPEN_EXISTING, /* creation disposition */
2663 0, /* file attributes */ 2682 FILE_FLAG_BACKUP_SEMANTICS, /* file attributes */
2664 NULL); /* handle to template file */ 2683 NULL); /* handle to template file */
2665 if (hFile == INVALID_HANDLE_VALUE 2684 if (hFile == INVALID_HANDLE_VALUE
2666 && GetLastError() == ERROR_CALL_NOT_IMPLEMENTED) 2685 && GetLastError() == ERROR_CALL_NOT_IMPLEMENTED)
2667 { 2686 {
2668 /* Retry with non-wide function (for Windows 98). */ 2687 /* Retry with non-wide function (for Windows 98). */
2669 vim_free(wn); 2688 vim_free(wn);
2670 wn = NULL; 2689 wn = NULL;
2671 } 2690 }
2672 } 2691 }
2673 if (wn == NULL) 2692 if (wn == NULL)
2674 #endif 2693 #endif
2675 hFile = CreateFile(fname, /* file name */ 2694 hFile = CreateFile(fname, /* file name */
2676 GENERIC_READ, /* access mode */ 2695 GENERIC_READ, /* access mode */
2677 0, /* share mode */ 2696 FILE_SHARE_READ | FILE_SHARE_WRITE, /* share mode */
2678 NULL, /* security descriptor */ 2697 NULL, /* security descriptor */
2679 OPEN_EXISTING, /* creation disposition */ 2698 OPEN_EXISTING, /* creation disposition */
2680 0, /* file attributes */ 2699 FILE_FLAG_BACKUP_SEMANTICS, /* file attributes */
2681 NULL); /* handle to template file */ 2700 NULL); /* handle to template file */
2682 2701
2683 if (hFile != INVALID_HANDLE_VALUE) 2702 if (hFile != INVALID_HANDLE_VALUE)
2684 { 2703 {
2685 if (GetFileInformationByHandle(hFile, &inf) != 0 2704 if (GetFileInformationByHandle(hFile, info) != 0)
2686 && inf.nNumberOfLinks > 1) 2705 res = FILEINFO_OK;
2687 res = 1; 2706 else
2707 res = FILEINFO_INFO_FAIL;
2688 CloseHandle(hFile); 2708 CloseHandle(hFile);
2689 } 2709 }
2690 2710
2691 #ifdef FEAT_MBYTE 2711 #ifdef FEAT_MBYTE
2692 vim_free(wn); 2712 vim_free(wn);