* dir.cc (readdir_worker): Drop dir parameter from call to

readdir_get_ino.
	* fhandler.h (fhandler_disk_file::readdir_helper): Switch file name
	parameter to PUNICODE_STRING.
	* fhandler_disk_file.cc: Drop including ntdef.h.
	(class __DIR_mounts): Store mount points in UNICODE.  Additionally
	store cygdrive prefix in unicode here.  Change methods accordingly.
	(__DIR_mounts::eval_ino): Call new stat_worker instead of lstat64.
	(__DIR_mounts::~__DIR_mounts): New destructor to free UNICODE buffers.
	(path_conv::ndisk_links): Rewrite using native NT functions.
	(fhandler_base::fstat_by_handle): Use NAME_MAX instead of CYG_MAX_PATH.
	Always set pfvi->VolumeSerialNumber to non-0.  Remove last resort
	code.
	(fhandler_base::fstat_by_name): Rewrite using native NT functions.
	(fhandler_base::fstat_fs): Always call fstat_by_name if fstat_by_handle
	fails.
	(fhandler_base::fstat_helper): Rely on dwVolumeSerialNumber.
	(fhandler_disk_file::facl): Call fstat_by_name if fstat_by_handle fails.
	(DIR_BUF_SIZE): Define using NAME_MAX instead of CYG_MAX_PATH.
	(__DIR_cache): Remove __name.
	(d_dirname): Remove.
	(fhandler_disk_file::opendir): Drop pathname length check.
	Remove outdated comment.  Use get_name method instead of accessing
	pc.normalized_path directly.
	(readdir_get_ino): Drop unused dir parameter.  Accomodate throughout.
	Allocate fname dynamically.  Call new stat_worker instead of lstat64.
	Call NtOpenFile instead of CreateFile.  Call NtClose instead of
	CloseHandle.
	(fhandler_disk_file::readdir_helper): Use native NT functions.
	Check for volume mount points and use correct inode number.
	(fhandler_disk_file::readdir): Simplify slightly.
	Use get_name instead of pc.normalized_path.
	(fhandler_disk_file::rewinddir): Use RtlInitUnicodeString.
	(fhandler_cygdrive::fstat): Ignore floppy drives.  Set st_nlink
	correctly.
	(fhandler_cygdrive::readdir): Ignore floppy drives.
	* fhandler_netdrive.cc (fhandler_netdrive::readdir): Accommodate
	change to readdir_get_ino.
	* fhandler_proc.cc (PROC_DIR_COUNT): Define.
	(fhandler_proc::fstat): Evaluate correct link count for /proc.
	* ntdll.h (struct _FILE_DIRECTORY_INFORMATION): Define.
	(NtFsControlFile): Declare.
	(RtlAppendUnicodeToString): Declare.
	(RtlAppendUnicodeStringToString): Declare.
	(RtlCompareUnicodeString): Declare.
	(RtlCopyUnicodeString): Declare.
	(RtlCreateUnicodeStringFromAsciiz): Declare.
	(RtlEqualUnicodeString): Declare.
	(RtlFreeUnicodeString): Declare.
	(RtlInitEmptyUnicodeString): Declare.
	(RtlSecondsSince1970ToTime): Declare.
	(RtlInitEmptyUnicodeString): Define as inline function.
	(RtlInitCountedUnicodeString): Define as inline function.
	* path.cc (path_conv::check): New method with PUNICODE_STRING as path,
	preliminary implementation.
	(mount_info::get_mounts_here): Change to create UNICODE_STRINGs.
	Also copy cygpath prefix into UNICODE_STRING.
	(is_floppy): Drop 9x consideration.
	* path.h: Drop including ntdef.h.
	(path_conv::check): Add declaration.
	(path_conv::path_conv): Add constructor for UNICODE_STRING paths.
	* shared_info.h (mount_info::get_mounts_here): Change declaration.
	* syscalls.cc: Drop forward declaration of stat_worker.
	(stat_worke): Take path_conv as parameter.  Drop nofollow flag.
	(stat64): Create matching path_conv and call stat_worker with it.
	(lstat64): Ditto.
	* winsup.h: Include ntdef.h.
	(stat_worker): Declare.
	(readdir_get_ino): Change declaration.

winsup/cygwin/path.cc

@@ -637,6 +637,23 @@ warn_msdos (const char *src)
 	SYMLINK_CONTENTS    - just return symlink contents
 */
 
+/* TODO: This implementation is only preliminary.  For internal
+   purposes it's necessary to have a path_conv::check function which
+   takes a UNICODE_STRING src path, otherwise we waste a lot of time
+   for converting back and forth.  The below implementation does
+   realy nothing but converting to char *, until path_conv handles
+   wide-char paths directly. */
+void
+path_conv::check (PUNICODE_STRING src, unsigned opt,
+		  const suffix_info *suffixes)
+{
+  char path[CYG_MAX_PATH];
+
+  user_shared->warned_msdos = true;
+  sys_wcstombs (path, CYG_MAX_PATH, src->Buffer, src->Length / 2);
+  path_conv::check (path, opt, suffixes);
+}
+
 void
 path_conv::check (const char *src, unsigned opt,
 		  const suffix_info *suffixes)
@@ -1840,7 +1857,8 @@ mount_info::conv_to_win32_path (const char *src_path, char *dst, device& dev,
 
 int
 mount_info::get_mounts_here (const char *parent_dir, int parent_dir_len,
-			     char **mount_points)
+			     PUNICODE_STRING mount_points,
+			     PUNICODE_STRING cygd)
 {
   int n_mounts = 0;
 
@@ -1853,12 +1871,16 @@ mount_info::get_mounts_here (const char *parent_dir, int parent_dir_len,
       if (last_slash == mi->posix_path)
 	{
 	  if (parent_dir_len == 1 && mi->posix_pathlen > 1)
-	    mount_points[n_mounts++] = last_slash + 1;
+	    RtlCreateUnicodeStringFromAsciiz (&mount_points[n_mounts++],
+					      last_slash + 1);
 	}
       else if (parent_dir_len == last_slash - mi->posix_path
 	       && strncasematch (parent_dir, mi->posix_path, parent_dir_len))
-	mount_points[n_mounts++] = last_slash + 1;
+	RtlCreateUnicodeStringFromAsciiz (&mount_points[n_mounts++],
+					  last_slash + 1);
     }
+  RtlCreateUnicodeStringFromAsciiz (cygd, cygdrive + 1);
+  cygd->Length -= 2;	// Strip trailing slash
   return n_mounts;
 }
 
@@ -2794,8 +2816,7 @@ is_floppy (const char *dos)
   char dev[256];
   if (!QueryDosDevice (dos, dev, 256))
     return false;
-  return strncasematch (dev, "\\Device\\Floppy", 14)
-	 || strcasematch (dev, "A:");
+  return strncasematch (dev, "\\Device\\Floppy", 14);
 }
 
 extern "C" FILE *