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

	buggy RestartScan behaviour of Windows 2000.
	* wincap.h: Define has_buggy_restart_scan throughout.
	* wincap.cc: Ditto.

4 files changed, 1077 insertions, 1 deletions

diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index 022fab78831..a70ef3e5d33 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,3 +1,10 @@
+2006-10-23  Corinna Vinschen  <corinna@vinschen.de>
+
+	* fhandler_disk_file.cc (fhandler_disk_file::rewinddir): Accomodate
+	buggy RestartScan behaviour of Windows 2000.
+	* wincap.h: Define has_buggy_restart_scan throughout.
+	* wincap.cc: Ditto.
+
 2006-10-17  Corinna Vinschen  <corinna@vinschen.de>
 
 	* glob.c: Remove.
diff --git a/winsup/cygwin/fhandler_disk_file.cc b/winsup/cygwin/fhandler_disk_file.cc
index 705af897dec..a14e89cd4d2 100644
--- a/winsup/cygwin/fhandler_disk_file.cc
+++ b/winsup/cygwin/fhandler_disk_file.cc
@@ -1870,7 +1870,38 @@ 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)
diff --git a/winsup/cygwin/wincap.cc b/winsup/cygwin/wincap.cc
new file mode 100644
index 00000000000..9c82e45a7bd
--- /dev/null
+++ b/winsup/cygwin/wincap.cc
@@ -0,0 +1,887 @@
+/* wincap.cc -- figure out on which OS we're running. Set the
+		capability class to the appropriate values.
+
+   Copyright 2001, 2002, 2003, 2004, 2005, 2006 Red Hat, Inc.
+
+This file is part of Cygwin.
+
+This software is a copyrighted work licensed under the terms of the
+Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
+details. */
+
+#include "winsup.h"
+
+static NO_COPY wincaps wincap_unknown = {
+  lock_file_highword:0x0,
+  chunksize:0x0,
+  shared:FILE_SHARE_READ | FILE_SHARE_WRITE,
+  is_winnt:false,
+  is_server:false,
+  access_denied_on_delete:false,
+  has_delete_on_close:false,
+  has_page_guard:false,
+  has_security:false,
+  has_security_descriptor_control:false,
+  has_get_process_times:false,
+  has_lseek_bug:false,
+  has_lock_file_ex:false,
+  has_signal_object_and_wait:false,
+  has_eventlog:false,
+  has_ip_helper_lib:false,
+  has_set_handle_information:false,
+  has_set_handle_information_on_console_handles:false,
+  supports_smp:false,
+  map_view_of_file_ex_sucks:false,
+  altgr_is_ctrl_alt:false,
+  has_physical_mem_access:false,
+  has_working_copy_on_write:false,
+  share_mmaps_only_by_name:false,
+  virtual_protect_works_on_shared_pages:false,
+  has_mmap_alignment_bug:false,
+  has_hard_links:false,
+  can_open_directories:false,
+  has_move_file_ex:false,
+  has_negative_pids:false,
+  has_unreliable_pipes:false,
+  has_named_pipes:false,
+  has_try_enter_critical_section:false,
+  has_raw_devices:false,
+  has_valid_processorlevel:false,
+  has_64bit_file_access:false,
+  has_process_io_counters:false,
+  supports_reading_modem_output_lines:false,
+  needs_memory_protection:false,
+  pty_needs_alloc_console:false,
+  has_terminal_services:false,
+  has_switch_to_thread:false,
+  cant_debug_dll_entry:false,
+  has_ioctl_storage_get_media_types_ex:false,
+  start_proc_suspended:true,
+  has_extended_priority_class:false,
+  has_guid_volumes:false,
+  detect_win16_exe:true,
+  has_null_console_handler_routine:false,
+  has_disk_ex_ioctls:false,
+  has_working_virtual_lock:false,
+  has_disabled_user_tos_setting:false,
+  has_fileid_dirinfo:false,
+  has_exclusiveaddruse:false,
+  has_buggy_restart_scan:false,
+};
+
+static NO_COPY wincaps wincap_95 = {
+  lock_file_highword:0x0,
+  chunksize:32 * 1024 * 1024,
+  shared:FILE_SHARE_READ | FILE_SHARE_WRITE,
+  is_winnt:false,
+  is_server:false,
+  access_denied_on_delete:true,
+  has_delete_on_close:false,
+  has_page_guard:false,
+  has_security:false,
+  has_security_descriptor_control:false,
+  has_get_process_times:false,
+  has_lseek_bug:true,
+  has_lock_file_ex:false,
+  has_signal_object_and_wait:false,
+  has_eventlog:false,
+  has_ip_helper_lib:false,
+  has_set_handle_information:false,
+  has_set_handle_information_on_console_handles:false,
+  supports_smp:false,
+  map_view_of_file_ex_sucks:true,
+  altgr_is_ctrl_alt:false,
+  has_physical_mem_access:false,
+  has_working_copy_on_write:false,
+  share_mmaps_only_by_name:true,
+  virtual_protect_works_on_shared_pages:false,
+  has_mmap_alignment_bug:false,
+  has_hard_links:false,
+  can_open_directories:false,
+  has_move_file_ex:false,
+  has_negative_pids:true,
+  has_unreliable_pipes:true,
+  has_named_pipes:false,
+  has_try_enter_critical_section:false,
+  has_raw_devices:false,
+  has_valid_processorlevel:false,
+  has_64bit_file_access:false,
+  has_process_io_counters:false,
+  supports_reading_modem_output_lines:false,
+  needs_memory_protection:false,
+  pty_needs_alloc_console:false,
+  has_terminal_services:false,
+  has_switch_to_thread:false,
+  cant_debug_dll_entry:true,
+  has_ioctl_storage_get_media_types_ex:false,
+  start_proc_suspended:true,
+  has_extended_priority_class:false,
+  has_guid_volumes:false,
+  detect_win16_exe:true,
+  has_null_console_handler_routine:false,
+  has_disk_ex_ioctls:false,
+  has_working_virtual_lock:false,
+  has_disabled_user_tos_setting:false,
+  has_fileid_dirinfo:false,
+  has_exclusiveaddruse:false,
+  has_buggy_restart_scan:false,
+};
+
+static NO_COPY wincaps wincap_95osr2 = {
+  lock_file_highword:0x0,
+  chunksize:32 * 1024 * 1024,
+  shared:FILE_SHARE_READ | FILE_SHARE_WRITE,
+  is_winnt:false,
+  is_server:false,
+  access_denied_on_delete:true,
+  has_delete_on_close:false,
+  has_page_guard:false,
+  has_security:false,
+  has_security_descriptor_control:false,
+  has_get_process_times:false,
+  has_lseek_bug:true,
+  has_lock_file_ex:false,
+  has_signal_object_and_wait:false,
+  has_eventlog:false,
+  has_ip_helper_lib:false,
+  has_set_handle_information:false,
+  has_set_handle_information_on_console_handles:false,
+  supports_smp:false,
+  map_view_of_file_ex_sucks:true,
+  altgr_is_ctrl_alt:false,
+  has_physical_mem_access:false,
+  has_working_copy_on_write:false,
+  share_mmaps_only_by_name:true,
+  virtual_protect_works_on_shared_pages:false,
+  has_mmap_alignment_bug:false,
+  has_hard_links:false,
+  can_open_directories:false,
+  has_move_file_ex:false,
+  has_negative_pids:true,
+  has_unreliable_pipes:true,
+  has_named_pipes:false,
+  has_try_enter_critical_section:false,
+  has_raw_devices:false,
+  has_valid_processorlevel:false,
+  has_64bit_file_access:false,
+  has_process_io_counters:false,
+  supports_reading_modem_output_lines:false,
+  needs_memory_protection:false,
+  pty_needs_alloc_console:false,
+  has_terminal_services:false,
+  has_switch_to_thread:false,
+  cant_debug_dll_entry:true,
+  has_ioctl_storage_get_media_types_ex:false,
+  start_proc_suspended:true,
+  has_extended_priority_class:false,
+  has_guid_volumes:false,
+  detect_win16_exe:true,
+  has_null_console_handler_routine:false,
+  has_disk_ex_ioctls:false,
+  has_working_virtual_lock:false,
+  has_disabled_user_tos_setting:false,
+  has_fileid_dirinfo:false,
+  has_exclusiveaddruse:false,
+  has_buggy_restart_scan:false,
+};
+
+static NO_COPY wincaps wincap_98 = {
+  lock_file_highword:0x0,
+  chunksize:32 * 1024 * 1024,
+  shared:FILE_SHARE_READ | FILE_SHARE_WRITE,
+  is_winnt:false,
+  is_server:false,
+  access_denied_on_delete:true,
+  has_delete_on_close:false,
+  has_page_guard:false,
+  has_security:false,
+  has_security_descriptor_control:false,
+  has_get_process_times:false,
+  has_lseek_bug:true,
+  has_lock_file_ex:false,
+  has_signal_object_and_wait:false,
+  has_eventlog:false,
+  has_ip_helper_lib:true,
+  has_set_handle_information:false,
+  has_set_handle_information_on_console_handles:false,
+  supports_smp:false,
+  map_view_of_file_ex_sucks:true,
+  altgr_is_ctrl_alt:false,
+  has_physical_mem_access:false,
+  has_working_copy_on_write:false,
+  share_mmaps_only_by_name:true,
+  virtual_protect_works_on_shared_pages:false,
+  has_mmap_alignment_bug:true,
+  has_hard_links:false,
+  can_open_directories:false,
+  has_move_file_ex:false,
+  has_negative_pids:true,
+  has_unreliable_pipes:true,
+  has_named_pipes:false,
+  has_try_enter_critical_section:false,
+  has_raw_devices:false,
+  has_valid_processorlevel:true,
+  has_64bit_file_access:false,
+  has_process_io_counters:false,
+  supports_reading_modem_output_lines:false,
+  needs_memory_protection:false,
+  pty_needs_alloc_console:false,
+  has_terminal_services:false,
+  has_switch_to_thread:false,
+  cant_debug_dll_entry:true,
+  has_ioctl_storage_get_media_types_ex:false,
+  start_proc_suspended:true,
+  has_extended_priority_class:false,
+  has_guid_volumes:false,
+  detect_win16_exe:true,
+  has_null_console_handler_routine:false,
+  has_disk_ex_ioctls:false,
+  has_working_virtual_lock:false,
+  has_disabled_user_tos_setting:false,
+  has_fileid_dirinfo:false,
+  has_exclusiveaddruse:false,
+  has_buggy_restart_scan:false,
+};
+
+static NO_COPY wincaps wincap_98se = {
+  lock_file_highword:0x0,
+  chunksize:32 * 1024 * 1024,
+  shared:FILE_SHARE_READ | FILE_SHARE_WRITE,
+  is_winnt:false,
+  is_server:false,
+  access_denied_on_delete:true,
+  has_delete_on_close:false,
+  has_page_guard:false,
+  has_security:false,
+  has_security_descriptor_control:false,
+  has_get_process_times:false,
+  has_lseek_bug:true,
+  has_lock_file_ex:false,
+  has_signal_object_and_wait:false,
+  has_eventlog:false,
+  has_ip_helper_lib:true,
+  has_set_handle_information:false,
+  has_set_handle_information_on_console_handles:false,
+  supports_smp:false,
+  map_view_of_file_ex_sucks:true,
+  altgr_is_ctrl_alt:false,
+  has_physical_mem_access:false,
+  has_working_copy_on_write:false,
+  share_mmaps_only_by_name:true,
+  virtual_protect_works_on_shared_pages:false,
+  has_mmap_alignment_bug:true,
+  has_hard_links:false,
+  can_open_directories:false,
+  has_move_file_ex:false,
+  has_negative_pids:true,
+  has_unreliable_pipes:true,
+  has_named_pipes:false,
+  has_try_enter_critical_section:false,
+  has_raw_devices:false,
+  has_valid_processorlevel:true,
+  has_64bit_file_access:false,
+  has_process_io_counters:false,
+  supports_reading_modem_output_lines:false,
+  needs_memory_protection:false,
+  pty_needs_alloc_console:false,
+  has_terminal_services:false,
+  has_switch_to_thread:false,
+  cant_debug_dll_entry:true,
+  has_ioctl_storage_get_media_types_ex:false,
+  start_proc_suspended:true,
+  has_extended_priority_class:false,
+  has_guid_volumes:false,
+  detect_win16_exe:true,
+  has_null_console_handler_routine:false,
+  has_disk_ex_ioctls:false,
+  has_working_virtual_lock:false,
+  has_disabled_user_tos_setting:false,
+  has_fileid_dirinfo:false,
+  has_exclusiveaddruse:false,
+  has_buggy_restart_scan:false,
+};
+
+static NO_COPY wincaps wincap_me = {
+  lock_file_highword:0x0,
+  chunksize:32 * 1024 * 1024,
+  shared:FILE_SHARE_READ | FILE_SHARE_WRITE,
+  is_winnt:false,
+  is_server:false,
+  access_denied_on_delete:true,
+  has_delete_on_close:false,
+  has_page_guard:false,
+  has_security:false,
+  has_security_descriptor_control:false,
+  has_get_process_times:false,
+  has_lseek_bug:true,
+  has_lock_file_ex:false,
+  has_signal_object_and_wait:false,
+  has_eventlog:false,
+  has_ip_helper_lib:true,
+  has_set_handle_information:false,
+  has_set_handle_information_on_console_handles:false,
+  supports_smp:false,
+  map_view_of_file_ex_sucks:true,
+  altgr_is_ctrl_alt:false,
+  has_physical_mem_access:false,
+  has_working_copy_on_write:false,
+  share_mmaps_only_by_name:true,
+  virtual_protect_works_on_shared_pages:false,
+  has_mmap_alignment_bug:false,
+  has_hard_links:false,
+  can_open_directories:false,
+  has_move_file_ex:false,
+  has_negative_pids:true,
+  has_unreliable_pipes:true,
+  has_named_pipes:false,
+  has_try_enter_critical_section:false,
+  has_raw_devices:false,
+  has_valid_processorlevel:true,
+  has_64bit_file_access:false,
+  has_process_io_counters:false,
+  supports_reading_modem_output_lines:false,
+  needs_memory_protection:false,
+  pty_needs_alloc_console:false,
+  has_terminal_services:false,
+  has_switch_to_thread:false,
+  cant_debug_dll_entry:true,
+  has_ioctl_storage_get_media_types_ex:false,
+  start_proc_suspended:true,
+  has_extended_priority_class:false,
+  has_guid_volumes:false,
+  detect_win16_exe:true,
+  has_null_console_handler_routine:false,
+  has_disk_ex_ioctls:false,
+  has_working_virtual_lock:false,
+  has_disabled_user_tos_setting:false,
+  has_fileid_dirinfo:false,
+  has_exclusiveaddruse:false,
+  has_buggy_restart_scan:false,
+};
+
+static NO_COPY wincaps wincap_nt3 = {
+  lock_file_highword:UINT32_MAX,
+  chunksize:0,
+  shared:FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
+  is_winnt:true,
+  is_server:false,
+  access_denied_on_delete:false,
+  has_delete_on_close:true,
+  has_page_guard:true,
+  has_security:true,
+  has_security_descriptor_control:false,
+  has_get_process_times:true,
+  has_lseek_bug:false,
+  has_lock_file_ex:true,
+  has_signal_object_and_wait:false,
+  has_eventlog:true,
+  has_ip_helper_lib:false,
+  has_set_handle_information:true,
+  has_set_handle_information_on_console_handles:false,
+  supports_smp:false,
+  map_view_of_file_ex_sucks:false,
+  altgr_is_ctrl_alt:true,
+  has_physical_mem_access:true,
+  has_working_copy_on_write:true,
+  share_mmaps_only_by_name:false,
+  virtual_protect_works_on_shared_pages:true,
+  has_mmap_alignment_bug:false,
+  has_hard_links:true,
+  can_open_directories:true,
+  has_move_file_ex:true,
+  has_negative_pids:false,
+  has_unreliable_pipes:false,
+  has_named_pipes:true,
+  has_try_enter_critical_section:false,
+  has_raw_devices:true,
+  has_valid_processorlevel:true,
+  has_64bit_file_access:true,
+  has_process_io_counters:false,
+  supports_reading_modem_output_lines:true,
+  needs_memory_protection:true,
+  pty_needs_alloc_console:true,
+  has_terminal_services:false,
+  has_switch_to_thread:false,
+  cant_debug_dll_entry:false,
+  has_ioctl_storage_get_media_types_ex:false,
+  start_proc_suspended:false,
+  has_extended_priority_class:false,
+  has_guid_volumes:false,
+  detect_win16_exe:false,
+  has_null_console_handler_routine:true,
+  has_disk_ex_ioctls:false,
+  has_working_virtual_lock:true,
+  has_disabled_user_tos_setting:false,
+  has_fileid_dirinfo:false,
+  has_exclusiveaddruse:false,
+  has_buggy_restart_scan:false,
+};
+
+static NO_COPY wincaps wincap_nt4 = {
+  lock_file_highword:UINT32_MAX,
+  chunksize:0,
+  shared:FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
+  is_winnt:true,
+  is_server:false,
+  access_denied_on_delete:false,
+  has_delete_on_close:true,
+  has_page_guard:true,
+  has_security:true,
+  has_security_descriptor_control:false,
+  has_get_process_times:true,
+  has_lseek_bug:false,
+  has_lock_file_ex:true,
+  has_signal_object_and_wait:true,
+  has_eventlog:true,
+  has_ip_helper_lib:false,
+  has_set_handle_information:true,
+  has_set_handle_information_on_console_handles:false,
+  supports_smp:true,
+  map_view_of_file_ex_sucks:false,
+  altgr_is_ctrl_alt:true,
+  has_physical_mem_access:true,
+  has_working_copy_on_write:true,
+  share_mmaps_only_by_name:false,
+  virtual_protect_works_on_shared_pages:true,
+  has_mmap_alignment_bug:false,
+  has_hard_links:true,
+  can_open_directories:true,
+  has_move_file_ex:true,
+  has_negative_pids:false,
+  has_unreliable_pipes:false,
+  has_named_pipes:true,
+  has_try_enter_critical_section:true,
+  has_raw_devices:true,
+  has_valid_processorlevel:true,
+  has_64bit_file_access:true,
+  has_process_io_counters:false,
+  supports_reading_modem_output_lines:true,
+  needs_memory_protection:true,
+  pty_needs_alloc_console:true,
+  has_terminal_services:false,
+  has_switch_to_thread:true,
+  cant_debug_dll_entry:false,
+  has_ioctl_storage_get_media_types_ex:false,
+  start_proc_suspended:false,
+  has_extended_priority_class:false,
+  has_guid_volumes:false,
+  detect_win16_exe:false,
+  has_null_console_handler_routine:true,
+  has_disk_ex_ioctls:false,
+  has_working_virtual_lock:true,
+  has_disabled_user_tos_setting:false,
+  has_fileid_dirinfo:false,
+  has_exclusiveaddruse:false,
+  has_buggy_restart_scan:false,
+};
+
+static NO_COPY wincaps wincap_nt4sp4 = {
+  lock_file_highword:UINT32_MAX,
+  chunksize:0,
+  shared:FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
+  is_winnt:true,
+  is_server:false,
+  access_denied_on_delete:false,
+  has_delete_on_close:true,
+  has_page_guard:true,
+  has_security:true,
+  has_security_descriptor_control:false,
+  has_get_process_times:true,
+  has_lseek_bug:false,
+  has_lock_file_ex:true,
+  has_signal_object_and_wait:true,
+  has_eventlog:true,
+  has_ip_helper_lib:true,
+  has_set_handle_information:true,
+  has_set_handle_information_on_console_handles:false,
+  supports_smp:true,
+  map_view_of_file_ex_sucks:false,
+  altgr_is_ctrl_alt:true,
+  has_physical_mem_access:true,
+  has_working_copy_on_write:true,
+  share_mmaps_only_by_name:false,
+  virtual_protect_works_on_shared_pages:true,
+  has_mmap_alignment_bug:false,
+  has_hard_links:true,
+  can_open_directories:true,
+  has_move_file_ex:true,
+  has_negative_pids:false,
+  has_unreliable_pipes:false,
+  has_named_pipes:true,
+  has_try_enter_critical_section:true,
+  has_raw_devices:true,
+  has_valid_processorlevel:true,
+  has_64bit_file_access:true,
+  has_process_io_counters:false,
+  supports_reading_modem_output_lines:true,
+  needs_memory_protection:true,
+  pty_needs_alloc_console:true,
+  has_terminal_services:false,
+  has_switch_to_thread:true,
+  cant_debug_dll_entry:false,
+  has_ioctl_storage_get_media_types_ex:false,
+  start_proc_suspended:false,
+  has_extended_priority_class:false,
+  has_guid_volumes:false,
+  detect_win16_exe:false,
+  has_null_console_handler_routine:true,
+  has_disk_ex_ioctls:false,
+  has_working_virtual_lock:true,
+  has_disabled_user_tos_setting:false,
+  has_fileid_dirinfo:false,
+  has_exclusiveaddruse:true,
+  has_buggy_restart_scan:false,
+};
+
+static NO_COPY wincaps wincap_2000 = {
+  lock_file_highword:UINT32_MAX,
+  chunksize:0,
+  shared:FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
+  is_winnt:true,
+  is_server:false,
+  access_denied_on_delete:false,
+  has_delete_on_close:true,
+  has_page_guard:true,
+  has_security:true,
+  has_security_descriptor_control:true,
+  has_get_process_times:true,
+  has_lseek_bug:false,
+  has_lock_file_ex:true,
+  has_signal_object_and_wait:true,
+  has_eventlog:true,
+  has_ip_helper_lib:true,
+  has_set_handle_information:true,
+  has_set_handle_information_on_console_handles:true,
+  supports_smp:true,
+  map_view_of_file_ex_sucks:false,
+  altgr_is_ctrl_alt:true,
+  has_physical_mem_access:true,
+  has_working_copy_on_write:true,
+  share_mmaps_only_by_name:false,
+  virtual_protect_works_on_shared_pages:true,
+  has_mmap_alignment_bug:false,
+  has_hard_links:true,
+  can_open_directories:true,
+  has_move_file_ex:true,
+  has_negative_pids:false,
+  has_unreliable_pipes:false,
+  has_named_pipes:true,
+  has_try_enter_critical_section:true,
+  has_raw_devices:true,
+  has_valid_processorlevel:true,
+  has_64bit_file_access:true,
+  has_process_io_counters:true,
+  supports_reading_modem_output_lines:true,
+  needs_memory_protection:true,
+  pty_needs_alloc_console:true,
+  has_terminal_services:true,
+  has_switch_to_thread:true,
+  cant_debug_dll_entry:false,
+  has_ioctl_storage_get_media_types_ex:false,
+  start_proc_suspended:false,
+  has_extended_priority_class:true,
+  has_guid_volumes:true,
+  detect_win16_exe:false,
+  has_null_console_handler_routine:true,
+  has_disk_ex_ioctls:false,
+  has_working_virtual_lock:true,
+  has_disabled_user_tos_setting:true,
+  has_fileid_dirinfo:true,
+  has_exclusiveaddruse:true,
+  has_buggy_restart_scan:true,
+};
+
+static NO_COPY wincaps wincap_xp = {
+  lock_file_highword:UINT32_MAX,
+  chunksize:0,
+  shared:FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
+  is_winnt:true,
+  is_server:false,
+  access_denied_on_delete:false,
+  has_delete_on_close:true,
+  has_page_guard:true,
+  has_security:true,
+  has_security_descriptor_control:true,
+  has_get_process_times:true,
+  has_lseek_bug:false,
+  has_lock_file_ex:true,
+  has_signal_object_and_wait:true,
+  has_eventlog:true,
+  has_ip_helper_lib:true,
+  has_set_handle_information:true,
+  has_set_handle_information_on_console_handles:true,
+  supports_smp:true,
+  map_view_of_file_ex_sucks:false,
+  altgr_is_ctrl_alt:true,
+  has_physical_mem_access:true,
+  has_working_copy_on_write:true,
+  share_mmaps_only_by_name:false,
+  virtual_protect_works_on_shared_pages:true,
+  has_mmap_alignment_bug:false,
+  has_hard_links:true,
+  can_open_directories:true,
+  has_move_file_ex:true,
+  has_negative_pids:false,
+  has_unreliable_pipes:false,
+  has_named_pipes:true,
+  has_try_enter_critical_section:true,
+  has_raw_devices:true,
+  has_valid_processorlevel:true,
+  has_64bit_file_access:true,
+  has_process_io_counters:true,
+  supports_reading_modem_output_lines:true,
+  needs_memory_protection:true,
+  pty_needs_alloc_console:true,
+  has_terminal_services:true,
+  has_switch_to_thread:true,
+  cant_debug_dll_entry:false,
+  has_ioctl_storage_get_media_types_ex:true,
+  start_proc_suspended:false,
+  has_extended_priority_class:true,
+  has_guid_volumes:true,
+  detect_win16_exe:false,
+  has_null_console_handler_routine:true,
+  has_disk_ex_ioctls:true,
+  has_working_virtual_lock:true,
+  has_disabled_user_tos_setting:true,
+  has_fileid_dirinfo:true,
+  has_exclusiveaddruse:true,
+  has_buggy_restart_scan:false,
+};
+
+static NO_COPY wincaps wincap_2003 = {
+  lock_file_highword:UINT32_MAX,
+  chunksize:0,
+  shared:FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
+  is_winnt:true,
+  is_server:true,
+  access_denied_on_delete:false,
+  has_delete_on_close:true,
+  has_page_guard:true,
+  has_security:true,
+  has_security_descriptor_control:true,
+  has_get_process_times:true,
+  has_lseek_bug:false,
+  has_lock_file_ex:true,
+  has_signal_object_and_wait:true,
+  has_eventlog:true,
+  has_ip_helper_lib:true,
+  has_set_handle_information:true,
+  has_set_handle_information_on_console_handles:true,
+  supports_smp:true,
+  map_view_of_file_ex_sucks:false,
+  altgr_is_ctrl_alt:true,
+  has_physical_mem_access:true,
+  has_working_copy_on_write:true,
+  share_mmaps_only_by_name:false,
+  virtual_protect_works_on_shared_pages:true,
+  has_mmap_alignment_bug:false,
+  has_hard_links:true,
+  can_open_directories:true,
+  has_move_file_ex:true,
+  has_negative_pids:false,
+  has_unreliable_pipes:false,
+  has_named_pipes:true,
+  has_try_enter_critical_section:true,
+  has_raw_devices:true,
+  has_valid_processorlevel:true,
+  has_64bit_file_access:true,
+  has_process_io_counters:true,
+  supports_reading_modem_output_lines:true,
+  needs_memory_protection:true,
+  pty_needs_alloc_console:true,
+  has_terminal_services:true,
+  has_switch_to_thread:true,
+  cant_debug_dll_entry:false,
+  has_ioctl_storage_get_media_types_ex:true,
+  start_proc_suspended:false,
+  has_extended_priority_class:true,
+  has_guid_volumes:true,
+  detect_win16_exe:false,
+  has_null_console_handler_routine:true,
+  has_disk_ex_ioctls:true,
+  has_working_virtual_lock:true,
+  has_disabled_user_tos_setting:true,
+  has_fileid_dirinfo:true,
+  has_exclusiveaddruse:true,
+  has_buggy_restart_scan:false,
+};
+
+static NO_COPY wincaps wincap_vista = {
+  lock_file_highword:UINT32_MAX,
+  chunksize:0,
+  shared:FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
+  is_winnt:true,
+  is_server:true,
+  access_denied_on_delete:false,
+  has_delete_on_close:true,
+  has_page_guard:true,
+  has_security:true,
+  has_security_descriptor_control:true,
+  has_get_process_times:true,
+  has_lseek_bug:false,
+  has_lock_file_ex:true,
+  has_signal_object_and_wait:true,
+  has_eventlog:true,
+  has_ip_helper_lib:true,
+  has_set_handle_information:true,
+  has_set_handle_information_on_console_handles:true,
+  supports_smp:true,
+  map_view_of_file_ex_sucks:false,
+  altgr_is_ctrl_alt:true,
+  has_physical_mem_access:true,
+  has_working_copy_on_write:true,
+  share_mmaps_only_by_name:false,
+  virtual_protect_works_on_shared_pages:true,
+  has_mmap_alignment_bug:false,
+  has_hard_links:true,
+  can_open_directories:true,
+  has_move_file_ex:true,
+  has_negative_pids:false,
+  has_unreliable_pipes:false,
+  has_named_pipes:true,
+  has_try_enter_critical_section:true,
+  has_raw_devices:true,
+  has_valid_processorlevel:true,
+  has_64bit_file_access:true,
+  has_process_io_counters:true,
+  supports_reading_modem_output_lines:true,
+  needs_memory_protection:true,
+  pty_needs_alloc_console:true,
+  has_terminal_services:true,
+  has_switch_to_thread:true,
+  cant_debug_dll_entry:false,
+  has_ioctl_storage_get_media_types_ex:true,
+  start_proc_suspended:false,
+  has_extended_priority_class:true,
+  has_guid_volumes:true,
+  detect_win16_exe:false,
+  has_null_console_handler_routine:true,
+  has_disk_ex_ioctls:true,
+  has_working_virtual_lock:true,
+  has_disabled_user_tos_setting:true,
+  has_fileid_dirinfo:true,
+  has_exclusiveaddruse:true,
+  has_buggy_restart_scan:false,
+};
+
+wincapc wincap __attribute__((section (".cygwin_dll_common"), shared));
+
+void
+wincapc::init ()
+{
+  const char *os;
+  bool has_osversioninfoex = false;
+
+  if (caps)
+    return;		// already initialized
+
+  memset (&version, 0, sizeof version);
+  /* Request simple version info first. */
+  version.dwOSVersionInfoSize = sizeof (OSVERSIONINFO);
+  GetVersionEx (reinterpret_cast<LPOSVERSIONINFO>(&version));
+
+  switch (version.dwPlatformId)
+    {
+      case VER_PLATFORM_WIN32_NT:
+	switch (version.dwMajorVersion)
+	  {
+	    case 3:
+	      os = "NT";
+	      caps = &wincap_nt3;
+	      break;
+	    case 4:
+	      os = "NT";
+	      if (strcmp (version.szCSDVersion, "Service Pack 4") < 0)
+		caps = &wincap_nt4;
+	      else
+		{
+		  caps = &wincap_nt4sp4;
+		  if (strcmp (version.szCSDVersion, "Service Pack 6") >= 0)
+		    has_osversioninfoex = true;
+		}
+	      break;
+	    case 5:
+	      os = "NT";
+	      has_osversioninfoex = true;
+	      switch (version.dwMinorVersion)
+		{
+		  case 0:
+		    caps = &wincap_2000;
+		    break;
+
+		  case 1:
+		    caps = &wincap_xp;
+		    break;
+
+		  default:
+		    caps = &wincap_2003;
+		}
+	      break;
+	    case 6:
+	      os = "NT";
+	      has_osversioninfoex = true;
+	      caps = &wincap_vista;
+	      break;
+	    default:
+	      os = "??";
+	      caps = &wincap_unknown;
+	      break;
+	  }
+	break;
+      case VER_PLATFORM_WIN32_WINDOWS:
+	switch (version.dwMinorVersion)
+	  {
+	    case 0:
+	      os = "95";
+	      if (strchr (version.szCSDVersion, 'C'))
+		caps = &wincap_95osr2;
+	      else
+		caps = &wincap_95;
+	      break;
+	    case 10:
+	      os = "98";
+	      if (strchr (version.szCSDVersion, 'A'))
+		caps = &wincap_98se;
+	      else
+		caps = &wincap_98;
+	      break;
+	    case 90:
+	      os = "ME";
+	      caps = &wincap_me;
+	      break;
+	    default:
+	      os = "??";
+	      caps = &wincap_unknown;
+	      break;
+	  }
+	break;
+      default:
+	os = "??";
+	caps = &wincap_unknown;
+	break;
+    }
+
+  if (has_osversioninfoex)
+    {
+      /* Request extended version to get server info.
+	 Available since NT4 SP6. */
+      version.dwOSVersionInfoSize = sizeof (OSVERSIONINFOEX);
+      GetVersionEx (reinterpret_cast<LPOSVERSIONINFO>(&version));
+      if (version.wProductType != VER_NT_WORKSTATION)
+	((wincaps *)this->caps)->is_server = true;
+    }
+
+  BOOL is_wow64_proc = FALSE;
+  if (IsWow64Process (GetCurrentProcess (), &is_wow64_proc))
+    wow64 = is_wow64_proc;
+
+  __small_sprintf (osnam, "%s-%d.%d", os, version.dwMajorVersion,
+		   version.dwMinorVersion);
+}
+
+void
+wincapc::set_chunksize (DWORD nchunksize)
+{
+  ((wincaps *)this->caps)->chunksize = nchunksize;
+}
diff --git a/winsup/cygwin/wincap.h b/winsup/cygwin/wincap.h
new file mode 100644
index 00000000000..0f1b95a15b5
--- /dev/null
+++ b/winsup/cygwin/wincap.h
@@ -0,0 +1,151 @@
+/* wincap.h: Header for OS capability class.
+
+   Copyright 2001, 2002, 2003, 2004, 2005, 2006 Red Hat, Inc.
+
+This file is part of Cygwin.
+
+This software is a copyrighted work licensed under the terms of the
+Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
+details. */
+
+#ifndef _WINCAP_H
+#define _WINCAP_H
+
+struct wincaps
+{
+  DWORD    lock_file_highword;
+  DWORD    chunksize;
+  int      shared;
+  unsigned is_winnt                                     : 1;
+  unsigned is_server                                    : 1;
+  unsigned access_denied_on_delete                      : 1;
+  unsigned has_delete_on_close                          : 1;
+  unsigned has_page_guard                               : 1;
+  unsigned has_security                                 : 1;
+  unsigned has_security_descriptor_control              : 1;
+  unsigned has_get_process_times                        : 1;
+  unsigned has_lseek_bug                                : 1;
+  unsigned has_lock_file_ex                             : 1;
+  unsigned has_signal_object_and_wait                   : 1;
+  unsigned has_eventlog                                 : 1;
+  unsigned has_ip_helper_lib                            : 1;
+  unsigned has_set_handle_information                   : 1;
+  unsigned has_set_handle_information_on_console_handles: 1;
+  unsigned supports_smp                                 : 1;
+  unsigned map_view_of_file_ex_sucks                    : 1;
+  unsigned altgr_is_ctrl_alt                            : 1;
+  unsigned has_physical_mem_access                      : 1;
+  unsigned has_working_copy_on_write                    : 1;
+  unsigned share_mmaps_only_by_name                     : 1;
+  unsigned virtual_protect_works_on_shared_pages        : 1;
+  unsigned has_mmap_alignment_bug			: 1;
+  unsigned has_hard_links                               : 1;
+  unsigned can_open_directories                         : 1;
+  unsigned has_move_file_ex                             : 1;
+  unsigned has_negative_pids                            : 1;
+  unsigned has_unreliable_pipes                         : 1;
+  unsigned has_named_pipes                              : 1;
+  unsigned has_try_enter_critical_section		: 1;
+  unsigned has_raw_devices				: 1;
+  unsigned has_valid_processorlevel			: 1;
+  unsigned has_64bit_file_access			: 1;
+  unsigned has_process_io_counters                      : 1;
+  unsigned supports_reading_modem_output_lines          : 1;
+  unsigned needs_memory_protection			: 1;
+  unsigned pty_needs_alloc_console			: 1;
+  unsigned has_terminal_services			: 1;
+  unsigned has_switch_to_thread				: 1;
+  unsigned cant_debug_dll_entry				: 1;
+  unsigned has_ioctl_storage_get_media_types_ex		: 1;
+  unsigned start_proc_suspended				: 1;
+  unsigned has_extended_priority_class			: 1;
+  unsigned has_guid_volumes				: 1;
+  unsigned detect_win16_exe				: 1;
+  unsigned has_null_console_handler_routine		: 1;
+  unsigned has_disk_ex_ioctls				: 1;
+  unsigned has_working_virtual_lock			: 1;
+  unsigned has_disabled_user_tos_setting		: 1;
+  unsigned has_fileid_dirinfo				: 1;
+  unsigned has_exclusiveaddruse				: 1;
+  unsigned has_buggy_restart_scan			: 1;
+};
+
+class wincapc
+{
+  OSVERSIONINFOEX  version;
+  char             osnam[40];
+  bool             wow64;
+  void             *caps;
+
+public:
+  void init ();
+
+  void set_chunksize (DWORD nchunksize);
+
+  const char *osname () const { return osnam; }
+  const bool is_wow64 () const { return wow64; }
+
+#define IMPLEMENT(cap) cap() const { return ((wincaps *) this->caps)->cap; }
+
+  DWORD IMPLEMENT (lock_file_highword)
+  DWORD IMPLEMENT (chunksize)
+  int   IMPLEMENT (shared)
+  bool  IMPLEMENT (is_winnt)
+  bool  IMPLEMENT (is_server)
+  bool  IMPLEMENT (access_denied_on_delete)
+  bool  IMPLEMENT (has_delete_on_close)
+  bool  IMPLEMENT (has_page_guard)
+  bool  IMPLEMENT (has_security)
+  bool  IMPLEMENT (has_security_descriptor_control)
+  bool  IMPLEMENT (has_get_process_times)
+  bool  IMPLEMENT (has_lseek_bug)
+  bool  IMPLEMENT (has_lock_file_ex)
+  bool  IMPLEMENT (has_signal_object_and_wait)
+  bool  IMPLEMENT (has_eventlog)
+  bool  IMPLEMENT (has_ip_helper_lib)
+  bool  IMPLEMENT (has_set_handle_information)
+  bool  IMPLEMENT (has_set_handle_information_on_console_handles)
+  bool  IMPLEMENT (supports_smp)
+  bool  IMPLEMENT (map_view_of_file_ex_sucks)
+  bool  IMPLEMENT (altgr_is_ctrl_alt)
+  bool  IMPLEMENT (has_physical_mem_access)
+  bool  IMPLEMENT (has_working_copy_on_write)
+  bool  IMPLEMENT (share_mmaps_only_by_name)
+  bool  IMPLEMENT (virtual_protect_works_on_shared_pages)
+  bool	IMPLEMENT (has_mmap_alignment_bug)
+  bool  IMPLEMENT (has_hard_links)
+  bool  IMPLEMENT (can_open_directories)
+  bool  IMPLEMENT (has_move_file_ex)
+  bool  IMPLEMENT (has_negative_pids)
+  bool  IMPLEMENT (has_unreliable_pipes)
+  bool  IMPLEMENT (has_named_pipes)
+  bool  IMPLEMENT (has_try_enter_critical_section)
+  bool  IMPLEMENT (has_raw_devices)
+  bool  IMPLEMENT (has_valid_processorlevel)
+  bool  IMPLEMENT (has_64bit_file_access)
+  bool  IMPLEMENT (has_process_io_counters)
+  bool  IMPLEMENT (supports_reading_modem_output_lines)
+  bool  IMPLEMENT (needs_memory_protection)
+  bool  IMPLEMENT (pty_needs_alloc_console)
+  bool  IMPLEMENT (has_terminal_services)
+  bool  IMPLEMENT (has_switch_to_thread)
+  bool	IMPLEMENT (cant_debug_dll_entry)
+  bool	IMPLEMENT (has_ioctl_storage_get_media_types_ex)
+  bool	IMPLEMENT (start_proc_suspended)
+  bool	IMPLEMENT (has_extended_priority_class)
+  bool	IMPLEMENT (has_guid_volumes)
+  bool	IMPLEMENT (detect_win16_exe)
+  bool	IMPLEMENT (has_null_console_handler_routine)
+  bool	IMPLEMENT (has_disk_ex_ioctls)
+  bool	IMPLEMENT (has_working_virtual_lock)
+  bool	IMPLEMENT (has_disabled_user_tos_setting)
+  bool	IMPLEMENT (has_fileid_dirinfo)
+  bool	IMPLEMENT (has_exclusiveaddruse)
+  bool	IMPLEMENT (has_buggy_restart_scan)
+
+#undef IMPLEMENT
+};
+
+extern wincapc wincap;
+
+#endif /* _WINCAP_H */