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+To: vim_dev@googlegroups.com
+Subject: Patch 7.3.172
+Fcc: outbox
+From: Bram Moolenaar <Bram@moolenaar.net>
+Mime-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+------------
+
+Patch 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)
+Files: src/if_cscope.c, src/fileio.c, src/os_win32.c,
+ src/proto/os_win32.pro, src/vim.h
+
+
+*** ../vim-7.3.171/src/if_cscope.c 2011-03-03 15:01:25.000000000 +0100
+--- src/if_cscope.c 2011-05-05 16:16:38.000000000 +0200
+***************
+*** 1412,1428 ****
+ {
+ short i, j;
+ #ifndef UNIX
+- HANDLE hFile;
+ BY_HANDLE_FILE_INFORMATION bhfi;
+
+- vim_memset(&bhfi, 0, sizeof(bhfi));
+ /* On windows 9x GetFileInformationByHandle doesn't work, so skip it */
+ if (!mch_windows95())
+ {
+! hFile = CreateFile(fname, FILE_READ_ATTRIBUTES, 0, NULL, OPEN_EXISTING,
+! FILE_ATTRIBUTE_NORMAL, NULL);
+! if (hFile == INVALID_HANDLE_VALUE)
+ {
+ if (p_csverbose)
+ {
+ char *cant_msg = _("E625: cannot open cscope database: %s");
+--- 1412,1426 ----
+ {
+ short i, j;
+ #ifndef UNIX
+ BY_HANDLE_FILE_INFORMATION bhfi;
+
+ /* On windows 9x GetFileInformationByHandle doesn't work, so skip it */
+ if (!mch_windows95())
+ {
+! switch (win32_fileinfo(fname, &bhfi))
+ {
++ case FILEINFO_ENC_FAIL: /* enc_to_utf16() failed */
++ case FILEINFO_READ_FAIL: /* CreateFile() failed */
+ if (p_csverbose)
+ {
+ char *cant_msg = _("E625: cannot open cscope database: %s");
+***************
+*** 1438,1452 ****
+ (void)EMSG2(cant_msg, fname);
+ }
+ return -1;
+! }
+! if (!GetFileInformationByHandle(hFile, &bhfi))
+! {
+! CloseHandle(hFile);
+ if (p_csverbose)
+ (void)EMSG(_("E626: cannot get cscope database information"));
+ return -1;
+ }
+- CloseHandle(hFile);
+ }
+ #endif
+
+--- 1436,1447 ----
+ (void)EMSG2(cant_msg, fname);
+ }
+ return -1;
+!
+! case FILEINFO_INFO_FAIL: /* GetFileInformationByHandle() failed */
+ if (p_csverbose)
+ (void)EMSG(_("E626: cannot get cscope database information"));
+ return -1;
+ }
+ }
+ #endif
+
+*** ../vim-7.3.171/src/fileio.c 2011-04-11 21:35:03.000000000 +0200
+--- src/fileio.c 2011-05-05 16:22:22.000000000 +0200
+***************
+*** 6555,6560 ****
+--- 6555,6575 ----
+ use_tmp_file = TRUE;
+ }
+ #endif
++ #ifdef WIN3264
++ {
++ BY_HANDLE_FILE_INFORMATION info1, info2;
++
++ /* It's possible for the source and destination to be the same file.
++ * In that case go through a temp file name. This makes rename("foo",
++ * "./foo") a no-op (in a complicated way). */
++ if (win32_fileinfo(from, &info1) == FILEINFO_OK
++ && win32_fileinfo(to, &info2) == FILEINFO_OK
++ && info1.dwVolumeSerialNumber == info2.dwVolumeSerialNumber
++ && info1.nFileIndexHigh == info2.nFileIndexHigh
++ && info1.nFileIndexLow == info2.nFileIndexLow)
++ use_tmp_file = TRUE;
++ }
++ #endif
+
+ #if defined(UNIX) || defined(CASE_INSENSITIVE_FILENAME)
+ if (use_tmp_file)
+*** ../vim-7.3.171/src/os_win32.c 2011-02-01 13:48:47.000000000 +0100
+--- src/os_win32.c 2011-05-05 16:24:17.000000000 +0200
+***************
+*** 2645,2669 ****
+ int
+ mch_is_linked(char_u *fname)
+ {
+ HANDLE hFile;
+! int res = 0;
+! BY_HANDLE_FILE_INFORMATION inf;
+ #ifdef FEAT_MBYTE
+ WCHAR *wn = NULL;
+
+ if (enc_codepage >= 0 && (int)GetACP() != enc_codepage)
+ wn = enc_to_utf16(fname, NULL);
+ if (wn != NULL)
+ {
+ hFile = CreateFileW(wn, /* file name */
+ GENERIC_READ, /* access mode */
+! 0, /* share mode */
+ NULL, /* security descriptor */
+ OPEN_EXISTING, /* creation disposition */
+! 0, /* file attributes */
+ NULL); /* handle to template file */
+ if (hFile == INVALID_HANDLE_VALUE
+! && GetLastError() == ERROR_CALL_NOT_IMPLEMENTED)
+ {
+ /* Retry with non-wide function (for Windows 98). */
+ vim_free(wn);
+--- 2645,2688 ----
+ int
+ mch_is_linked(char_u *fname)
+ {
++ BY_HANDLE_FILE_INFORMATION info;
++
++ return win32_fileinfo(fname, &info) == FILEINFO_OK
++ && info.nNumberOfLinks > 1;
++ }
++
++ /*
++ * Get the by-handle-file-information for "fname".
++ * Returns FILEINFO_OK when OK.
++ * returns FILEINFO_ENC_FAIL when enc_to_utf16() failed.
++ * Returns FILEINFO_READ_FAIL when CreateFile() failed.
++ * Returns FILEINFO_INFO_FAIL when GetFileInformationByHandle() failed.
++ */
++ int
++ win32_fileinfo(char_u *fname, BY_HANDLE_FILE_INFORMATION *info)
++ {
+ HANDLE hFile;
+! int res = FILEINFO_READ_FAIL;
+ #ifdef FEAT_MBYTE
+ WCHAR *wn = NULL;
+
+ if (enc_codepage >= 0 && (int)GetACP() != enc_codepage)
++ {
+ wn = enc_to_utf16(fname, NULL);
++ if (wn == NULL)
++ res = FILEINFO_ENC_FAIL;
++ }
+ if (wn != NULL)
+ {
+ hFile = CreateFileW(wn, /* file name */
+ GENERIC_READ, /* access mode */
+! FILE_SHARE_READ | FILE_SHARE_WRITE, /* share mode */
+ NULL, /* security descriptor */
+ OPEN_EXISTING, /* creation disposition */
+! FILE_FLAG_BACKUP_SEMANTICS, /* file attributes */
+ NULL); /* handle to template file */
+ if (hFile == INVALID_HANDLE_VALUE
+! && GetLastError() == ERROR_CALL_NOT_IMPLEMENTED)
+ {
+ /* Retry with non-wide function (for Windows 98). */
+ vim_free(wn);
+***************
+*** 2674,2690 ****
+ #endif
+ hFile = CreateFile(fname, /* file name */
+ GENERIC_READ, /* access mode */
+! 0, /* share mode */
+ NULL, /* security descriptor */
+ OPEN_EXISTING, /* creation disposition */
+! 0, /* file attributes */
+ NULL); /* handle to template file */
+
+ if (hFile != INVALID_HANDLE_VALUE)
+ {
+! if (GetFileInformationByHandle(hFile, &inf) != 0
+! && inf.nNumberOfLinks > 1)
+! res = 1;
+ CloseHandle(hFile);
+ }
+
+--- 2693,2710 ----
+ #endif
+ hFile = CreateFile(fname, /* file name */
+ GENERIC_READ, /* access mode */
+! FILE_SHARE_READ | FILE_SHARE_WRITE, /* share mode */
+ NULL, /* security descriptor */
+ OPEN_EXISTING, /* creation disposition */
+! FILE_FLAG_BACKUP_SEMANTICS, /* file attributes */
+ NULL); /* handle to template file */
+
+ if (hFile != INVALID_HANDLE_VALUE)
+ {
+! if (GetFileInformationByHandle(hFile, info) != 0)
+! res = FILEINFO_OK;
+! else
+! res = FILEINFO_INFO_FAIL;
+ CloseHandle(hFile);
+ }
+
+*** ../vim-7.3.171/src/proto/os_win32.pro 2010-10-23 14:02:48.000000000 +0200
+--- src/proto/os_win32.pro 2011-05-05 16:17:42.000000000 +0200
+***************
+*** 21,26 ****
+--- 21,27 ----
+ void mch_hide __ARGS((char_u *name));
+ int mch_isdir __ARGS((char_u *name));
+ int mch_is_linked __ARGS((char_u *fname));
++ int win32_fileinfo __ARGS((char_u *name, BY_HANDLE_FILE_INFORMATION *lpFileInfo));
+ int mch_writable __ARGS((char_u *name));
+ int mch_can_exe __ARGS((char_u *name));
+ int mch_nodetype __ARGS((char_u *name));
+*** ../vim-7.3.171/src/vim.h 2011-04-11 21:35:03.000000000 +0200
+--- src/vim.h 2011-05-05 16:16:57.000000000 +0200
+***************
+*** 2217,2220 ****
+--- 2217,2226 ----
+ #define KEYLEN_PART_MAP -2 /* keylen value for incomplete mapping */
+ #define KEYLEN_REMOVED 9999 /* keylen value for removed sequence */
+
++ /* Return values from win32_fileinfo(). */
++ #define FILEINFO_OK 0
++ #define FILEINFO_ENC_FAIL 1 /* enc_to_utf16() failed */
++ #define FILEINFO_READ_FAIL 2 /* CreateFile() failed */
++ #define FILEINFO_INFO_FAIL 3 /* GetFileInformationByHandle() failed */
++
+ #endif /* VIM__H */
+*** ../vim-7.3.171/src/version.c 2011-05-05 14:26:37.000000000 +0200
+--- src/version.c 2011-05-05 16:39:35.000000000 +0200
+***************
+*** 716,717 ****
+--- 716,719 ----
+ { /* Add new patch number below this line */
++ /**/
++ 172,
+ /**/
+
+--
+Q: What is a patch 22?
+A: A patch you need to include to make it possible to include patches.
+
+ /// Bram Moolenaar -- Bram@Moolenaar.net -- http://www.Moolenaar.net \\\
+/// sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ \\\
+\\\ an exciting new programming language -- http://www.Zimbu.org ///
+ \\\ help me help AIDS victims -- http://ICCF-Holland.org ///
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