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* fhandler_disk_file.cc (fhandler_disk_file::rmdir): Implement rmdir

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on NT by calling unlink_nt.  Check for directory here.
	* syscalls.cc (try_to_bin): Fix buggy debug_printf statement.
	(unlink_nt): Make non-static.  Don't use delete-on-close semantics on
	directoires.  Explain why.
This commit is contained in:
Corinna Vinschen 2007-01-26 12:25:23 +00:00
parent 2731a97413
commit 3be6ababd8
3 changed files with 48 additions and 18 deletions
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8
winsup/cygwin/ChangeLog
View File

@ -1,3 +1,11 @@
2007-01-26 Corinna Vinschen <corinna@vinschen.de>
* fhandler_disk_file.cc (fhandler_disk_file::rmdir): Implement rmdir
on NT by calling unlink_nt. Check for directory here.
* syscalls.cc (try_to_bin): Fix buggy debug_printf statement.
(unlink_nt): Make non-static. Don't use delete-on-close semantics on
directoires. Explain why.
2007-01-24 Corinna Vinschen <corinna@vinschen.de>
* net.cc (if_nametoindex): This time, really free IP_ADAPTER_ADDRESSES

20
winsup/cygwin/fhandler_disk_file.cc
View File

@ -1447,15 +1447,31 @@ fhandler_disk_file::mkdir (mode_t mode)
int
fhandler_disk_file::rmdir ()
{
extern DWORD unlink_nt (path_conv &win32_name, bool setattrs);
int res = -1;
if (!pc.isdir ())
{
set_errno (ENOTDIR);
return -1;
}
/* Even own directories can't be removed if R/O attribute is set. */
if (pc.has_attribute (FILE_ATTRIBUTE_READONLY))
SetFileAttributes (get_win32_name (),
(DWORD) pc & ~FILE_ATTRIBUTE_READONLY);
DWORD err, att = 0;
int rc = RemoveDirectory (get_win32_name ());
int rc;
if (wincap.is_winnt ())
{
rc = !(err = unlink_nt (pc, pc.has_attribute (FILE_ATTRIBUTE_READONLY)));
if (err)
SetLastError (err);
}
else
rc = RemoveDirectory (get_win32_name ());
if (isremote () && exists ())
att = GetFileAttributes (get_win32_name ());
@ -1488,7 +1504,7 @@ fhandler_disk_file::rmdir ()
__seterrno_from_win_error (err);
/* Directory still exists, restore its characteristics. */
if (pc.has_attribute (FILE_ATTRIBUTE_READONLY))
if (!wincap.is_winnt () && pc.has_attribute (FILE_ATTRIBUTE_READONLY))
SetFileAttributes (get_win32_name (), (DWORD) pc);
return res;

38
winsup/cygwin/syscalls.cc
View File

@ -225,7 +225,8 @@ try_to_bin (path_conv &win32_path, HANDLE h)
pfri->FileNameLength = uname.Length;
status = NtSetInformationFile (h, &io, pfri, size, FileRenameInformation);
if (!NT_SUCCESS (status))
debug_printf ("Move %s to %s failed, status = %p", status);
debug_printf ("Move %s to %s failed, status = %p", win32_path.get_win32 (),
recycler, status);
}
static DWORD
@ -236,7 +237,7 @@ unlink_9x (path_conv &win32_name)
return GetLastError ();
}
static DWORD
DWORD
unlink_nt (path_conv &win32_name, bool setattrs)
{
WCHAR wpath[CYG_MAX_PATH + 10];
@ -247,19 +248,24 @@ unlink_nt (path_conv &win32_name, bool setattrs)
HANDLE h;
ULONG flags = FILE_OPEN_FOR_BACKUP_INTENT;
/* Don't try "delete on close" if the file is on a remote share. If two
processes have open handles on a file and one of them calls unlink,
then it happens that the file is remove from the remote share even
though the other process still has an open handle. This other process
than gets Win32 error 59, ERROR_UNEXP_NET_ERR when trying to access the
file.
That does not happen when using DeleteFile (NtSetInformationFile, class
FileDispositionInformation), which nicely succeeds but still, the file
is available for the other process.
Microsoft KB 837665 describes this problem as a bug in 2K3, but I have
reproduced it on shares on Samba 2.2.8, Samba 3.0.2, NT4SP6, XP64SP1 and
2K3 and in all cases, DeleteFile works, "delete on close" does not. */
if (!win32_name.isremote ())
/* Don't open directories with "delete on close", because the NT internal
semantic is apparently different from the file semantic. If a directory
is opened "delete on close", the rename operation in try_to_bin fails
with STATUS_ACCESS_DENIED. So directories must be deleted using
NtSetInformationFile, class FileDispositionInformation, which works fine.
Don't try "delete on close" if the file is on a remote share. If two
processes have open handles on a file and one of them calls unlink, then
it happens that the file is removed from the remote share even though the
other process still has an open handle. This other process than gets
Win32 error 59, ERROR_UNEXP_NET_ERR when trying to access the file. That
does not happen when using NtSetInformationFile, class
FileDispositionInformation, which nicely succeeds but still, the file is
available for the other process. Microsoft KB 837665 describes this
problem as a bug in 2K3, but I have reproduced it on shares on Samba
2.2.8, Samba 3.0.2, NT4SP6, XP64SP1 and 2K3 and in all cases, DeleteFile
works, "delete on close" does not. */
if (!win32_name.isdir () && !win32_name.isremote ())
flags |= FILE_DELETE_ON_CLOSE;
/* Add the reparse point flag to native symlinks, otherwise we remove the
target, not the symlink. */
@ -301,7 +307,7 @@ unlink_nt (path_conv &win32_name, bool setattrs)
DWORD lasterr = 0;
if (win32_name.isremote ())
if (win32_name.isdir () || win32_name.isremote ())
{
FILE_DISPOSITION_INFORMATION disp = { TRUE };
status = NtSetInformationFile (h, &io, &disp, sizeof disp,