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* fhandler_disk_file.cc (fhandler_disk_file::rewinddir): Accomodate

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buggy RestartScan behaviour of Windows 2000.
	* wincap.h: Define has_buggy_restart_scan throughout.
	* wincap.cc: Ditto.
This commit is contained in:
Corinna Vinschen
2006-10-23 15:13:55 +00:00
parent fc545fe933
commit 7a229db654
4 changed files with 59 additions and 6 deletions
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33
winsup/cygwin/fhandler_disk_file.cc
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@@ -1975,7 +1975,38 @@ void
fhandler_disk_file::rewinddir (DIR *dir)
{
if (wincap.is_winnt ())
d_cachepos (dir) = 0;
{
d_cachepos (dir) = 0;
if (wincap.has_buggy_restart_scan () && isremote ())
{
/* This works around a W2K bug. The RestartScan parameter in calls
to NtQueryDiretoryFile on remote shares is ignored, thus resulting
in not being able to rewind on remote shares. By reopening the
directory, we get a fresh new directory pointers. w*/
UNICODE_STRING fname = {0, CYG_MAX_PATH * 2, (WCHAR *) L""};
OBJECT_ATTRIBUTES attr;
NTSTATUS status;
IO_STATUS_BLOCK io;
HANDLE new_dir;
InitializeObjectAttributes (&attr, &fname, OBJ_CASE_INSENSITIVE,
dir->__handle, NULL);
status = NtOpenFile (&new_dir, SYNCHRONIZE | FILE_LIST_DIRECTORY,
&attr, &io, wincap.shared (),
FILE_SYNCHRONOUS_IO_NONALERT
| FILE_OPEN_FOR_BACKUP_INTENT
| FILE_DIRECTORY_FILE);
if (!NT_SUCCESS (stat))
debug_printf ("Unable to reopen dir %s, NT error: 0x%08x, "
"win32: %lu", get_name (), status,
RtlNtStatusToDosError (status));
else
{
CloseHandle (dir->__handle);
dir->__handle = new_dir;
}
}
}
else if (dir->__handle != INVALID_HANDLE_VALUE)
{
if (dir->__handle)