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* devices.in (dev_cygdrive_storage): Revert mapping to \Device\Null.

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(dev_storage): Ditto for /dev.
	* devices.cc: Regenerate.
	* fhandler.cc (fhandler_base::open_null): New method to open a fake
	\Device\Null handler.
	(fhandler_base::open): Fix formatting.  Change O_ACCMODE test to a
	switch statement.  Simplify a test which still tested for a now unused
	create_disposition.
	* fhandler.h (fhandler_base::open_null): Declare.
	(fhandler_netdrive::close): Declare.
	* fhandler_dev.cc (fhandler_dev::open): Open fake \Device\Null handle
	by just calling new open_null method.
	* fhandler_disk_file.cc (fhandler_cygdrive::open): Ditto.
	* fhandler_netdrive.cc (fhandler_netdrive::open): Call open_null
	rather than setting nohandle.
	(fhandler_netdrive::close): New method.
	* fhandler_registry.cc (fetch_hkey): Fix token in RegOpenUserClassesRoot
	call.  Create valid key for HKEY_CURRENT_CONFIG by mapping to real key
	HKEY_LOCAL_MACHINE\System\CurrentControlSet\Hardware Profiles\Current.
	(fhandler_registry::open): Set nohandle only when using pseudo registry
	handle.
	* fhandler_virtual.cc (fhandler_virtual::opendir): Call open rather
	than just setting nohandle here.
	* fhandler_virtual::fstatvfs): Set ST_RDONLY fs flag.
	* globals.cc (ro_u_null): New readonly UNICODE_STRING for \Device\Null.
	* path.h (path_conv::set_path): Revert previous change caring for
	wide_path.
This commit is contained in:
Corinna Vinschen
2013-10-31 14:26:42 +00:00
parent a5f316d8cf
commit 5b312b4747
12 changed files with 138 additions and 79 deletions
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98
winsup/cygwin/fhandler.cc
View File

@ -507,6 +507,38 @@ fhandler_base::open_with_arch (int flags, mode_t mode)
return res;
}
/* Open a fake handle to \\Device\\Null. This is a helper function for
fhandlers which just need some handle to keep track of BSD flock locks. */
int
fhandler_base::open_null (int flags)
{
int res = 0;
HANDLE fh;
OBJECT_ATTRIBUTES attr;
IO_STATUS_BLOCK io;
NTSTATUS status;
InitializeObjectAttributes (&attr, &ro_u_null, OBJ_CASE_INSENSITIVE |
((flags & O_CLOEXEC) ? 0 : OBJ_INHERIT),
NULL, NULL);
status = NtCreateFile (&fh, GENERIC_READ | SYNCHRONIZE, &attr, &io, NULL, 0,
FILE_SHARE_READ | FILE_SHARE_WRITE, FILE_OPEN,
FILE_SYNCHRONOUS_IO_NONALERT, NULL, 0);
if (!NT_SUCCESS (status))
{
__seterrno_from_nt_status (status);
goto done;
}
set_io_handle (fh);
set_flags (flags, pc.binmode ());
res = 1;
set_open_status ();
done:
debug_printf ("%y = NtCreateFile (%p, ... %S ...)", status, fh, &ro_u_null);
syscall_printf ("%d = fhandler_base::open_null (%y)", res, flags);
return res;
}
/* Open system call handler function. */
int
fhandler_base::open (int flags, mode_t mode)
@ -529,38 +561,44 @@ fhandler_base::open (int flags, mode_t mode)
options = FILE_OPEN_FOR_BACKUP_INTENT;
switch (query_open ())
{
case query_read_control:
access = READ_CONTROL;
break;
case query_read_attributes:
access = READ_CONTROL | FILE_READ_ATTRIBUTES;
break;
case query_write_control:
access = READ_CONTROL | WRITE_OWNER | WRITE_DAC | FILE_WRITE_ATTRIBUTES;
break;
case query_write_dac:
access = READ_CONTROL | WRITE_DAC | FILE_WRITE_ATTRIBUTES;
break;
case query_write_attributes:
access = READ_CONTROL | FILE_WRITE_ATTRIBUTES;
break;
default:
if ((flags & O_ACCMODE) == O_RDONLY)
case query_read_control:
access = READ_CONTROL;
break;
case query_read_attributes:
access = READ_CONTROL | FILE_READ_ATTRIBUTES;
break;
case query_write_control:
access = READ_CONTROL | WRITE_OWNER | WRITE_DAC | FILE_WRITE_ATTRIBUTES;
break;
case query_write_dac:
access = READ_CONTROL | WRITE_DAC | FILE_WRITE_ATTRIBUTES;
break;
case query_write_attributes:
access = READ_CONTROL | FILE_WRITE_ATTRIBUTES;
break;
default:
switch (flags & O_ACCMODE)
{
case O_RDONLY:
access = GENERIC_READ;
else if ((flags & O_ACCMODE) == O_WRONLY)
break;
case O_WRONLY:
access = GENERIC_WRITE | READ_CONTROL | FILE_READ_ATTRIBUTES;
else
break;
default:
access = GENERIC_READ | GENERIC_WRITE;
if (flags & O_SYNC)
options |= FILE_WRITE_THROUGH;
if (flags & O_DIRECT)
options |= FILE_NO_INTERMEDIATE_BUFFERING;
if (get_major () != DEV_SERIAL_MAJOR && get_major () != DEV_TAPE_MAJOR)
{
options |= FILE_SYNCHRONOUS_IO_NONALERT;
access |= SYNCHRONIZE;
}
break;
break;
}
if (flags & O_SYNC)
options |= FILE_WRITE_THROUGH;
if (flags & O_DIRECT)
options |= FILE_NO_INTERMEDIATE_BUFFERING;
if (get_major () != DEV_SERIAL_MAJOR && get_major () != DEV_TAPE_MAJOR)
{
options |= FILE_SYNCHRONOUS_IO_NONALERT;
access |= SYNCHRONIZE;
}
break;
}
/* Don't use the FILE_OVERWRITE{_IF} flags here. See below for an
@ -596,7 +634,7 @@ fhandler_base::open (int flags, mode_t mode)
and/or FILE_ATTRIBUTE_SYSTEM attribute set, NtCreateFile fails with
STATUS_ACCESS_DENIED. Per MSDN you have to create the file with the
same attributes as already specified for the file. */
if (((flags & O_CREAT) || create_disposition == FILE_OVERWRITE)
if (create_disposition == FILE_CREATE
&& has_attribute (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM))
file_attributes |= pc.file_attributes ();