Do not do the AV retry loop on open if the file that is attempting to be

opened is really a directory.

FossilOrigin-Name: 03875633f465e82fbe99829f96db25f6d32bd333

manifest

@@ -1,5 +1,5 @@
-C Update\sa\stest\sin\sio.test\sto\saccount\sfor\s[05f98d4eec].
-D 2012-05-01T14:21:57.706
+C Do\snot\sdo\sthe\sAV\sretry\sloop\son\sopen\sif\sthe\sfile\sthat\sis\sattempting\sto\sbe\nopened\sis\sreally\sa\sdirectory.
+D 2012-05-07T13:15:20.389
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in 2f37e468503dbe79d35c9f6dffcf3fae1ae9ec20
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -160,7 +160,7 @@ F src/os.h 59beba555b65a450bd1d804220532971d4299f60
 F src/os_common.h 92815ed65f805560b66166e3583470ff94478f04
 F src/os_os2.c 4a75888ba3dfc820ad5e8177025972d74d7f2440
 F src/os_unix.c 424d46e0edab969293c2223f09923b2178171f47
-F src/os_win.c 5e9e933a412ab35de2a6506b3c6a8295b31b309e
+F src/os_win.c 5245515000a855dd0fe4f6e86dfe599cd7865b7b
 F src/pager.c bb5635dde0b152797836d1c72275284724bb563c
 F src/pager.h ef1eaf8593e78f73885c1dfac27ad83bee23bdc5
 F src/parse.y eb054bb40a5bf90d3422a01ed0e5df229461727a
@@ -995,7 +995,10 @@ F tool/tostr.awk e75472c2f98dd76e06b8c9c1367f4ab07e122d06
 F tool/vdbe-compress.tcl d70ea6d8a19e3571d7ab8c9b75cba86d1173ff0f
 F tool/warnings-clang.sh a8a0a3babda96dfb1ff51adda3cbbf3dfb7266c2
 F tool/warnings.sh fbc018d67fd7395f440c28f33ef0f94420226381
-P 1e51bffe777587cd05bd7db5e02d6291c3eb8c1a
-R 2c954175673c357079573f576ee6e960
-U dan
-Z 199b9a45180c95acb6ae422881191984
+P bfa61e781cb442be641486e7e55a1518e888d830
+R 6a3c8de48e2cdbaf71c115aca5627de9
+T *branch * win-check-dir
+T *sym-win-check-dir *
+T -sym-trunk *
+U drh
+Z 19d1e551d55fac16aea402b33644e4b5

manifest.uuid

@@ -1 +1 @@
-bfa61e781cb442be641486e7e55a1518e888d830
+03875633f465e82fbe99829f96db25f6d32bd333

src/os_win.c

@@ -3031,6 +3031,29 @@ static int getTempname(int nBuf, char *zBuf){
   return SQLITE_OK; 
 }
 
+/* Forward reference */
+static int winAccess(sqlite3_vfs*,const char*,int,int*);
+
+/*
+** Return TRUE if the named file is really a directory.  Return false if
+** it is something other than a directory, or if there is any kind of memory
+** allocation failure.
+*/
+static int winIsDir(sqlite3_vfs *pVfs, const char *zName){
+  int isDir = 0;
+  int rc;
+  char *zDirName;
+
+  zDirName = sqlite3_mprintf("%s/nul", zName);
+  if( zDirName ){
+    rc = winAccess(pVfs, zDirName, SQLITE_ACCESS_EXISTS, &isDir);
+    sqlite3_free(zDirName);
+  }else{
+    rc = SQLITE_NOMEM;
+  }
+  return rc==SQLITE_OK && isDir;
+}
+
 /*
 ** Open a file.
 */
@@ -3185,12 +3208,11 @@ static int winOpen(
                               dwShareMode, NULL,
                               dwCreationDisposition,
                               dwFlagsAndAttributes,
-                              NULL))==INVALID_HANDLE_VALUE &&
-                              retryIoerr(&cnt, &lastErrno) ){}
-/* isNT() is 1 if SQLITE_OS_WINCE==1, so this else is never executed. 
-** Since the ANSI version of these Windows API do not exist for WINCE,
-** it's important to not reference them for WINCE builds.
-*/
+                              NULL))==INVALID_HANDLE_VALUE
+        && !winIsDir(pVfs, zName)
+        && retryIoerr(&cnt, &lastErrno) ){
+               /* Noop */
+    }
 #if SQLITE_OS_WINCE==0
   }else{
     while( (h = osCreateFileA((LPCSTR)zConverted,