Intravision/reactos
1
0
Fork 0
mirror of https://github.com/reactos/reactos.git synced 2024-10-04 16:36:11 +00:00
Code Issues Packages Projects Releases Wiki Activity

Symbolic link should start with \??\, to be able to open the object from kernel mode

Browse source 
svn path=/trunk/; revision=23030
This commit is contained in:
Hervé Poussineau 2006-07-12 20:41:28 +00:00
parent c19c207f4e
commit b06a110bee
1 changed files with 6 additions and 24 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

30
reactos/ntoskrnl/io/iomgr/deviface.c
View file

@ -634,8 +634,8 @@ IoRegisterDeviceInterface(IN PDEVICE_OBJECT PhysicalDeviceObject,
ASSERT_IRQL(PASSIVE_LEVEL);
DPRINT("IoRegisterDeviceInterface(): PDO %p, RefString: %p, SLName: %p\n",
PhysicalDeviceObject, ReferenceString, SymbolicLinkName);
DPRINT("IoRegisterDeviceInterface(): PDO %p, RefString: %wZ\n",
PhysicalDeviceObject, ReferenceString);
/* Parameters must pass three border of checks */
DeviceObjectExtension = (PEXTENDED_DEVOBJ_EXTENSION)PhysicalDeviceObject->DeviceObjectExtension;
@ -916,14 +916,7 @@ IoRegisterDeviceInterface(IN PDEVICE_OBJECT PhysicalDeviceObject,
DPRINT("ZwSetValueKey() failed with status 0x%08lx\n", Status);
ExFreePool(SymbolicLinkName->Buffer);
}
/* Remove \\?\ at the start of symbolic link name */
SymbolicLinkName->Length -= 4 * sizeof(WCHAR);
SymbolicLinkName->MaximumLength -= 4 * sizeof(WCHAR);
RtlMoveMemory(
SymbolicLinkName->Buffer,
&SymbolicLinkName->Buffer[4],
SymbolicLinkName->Length);
SymbolicLinkName->Buffer[1] = '?';
ZwClose(SubKey);
ZwClose(InterfaceKey);
@ -962,7 +955,6 @@ IoSetDeviceInterfaceState(IN PUNICODE_STRING SymbolicLinkName,
{
PDEVICE_OBJECT PhysicalDeviceObject;
PFILE_OBJECT FileObject;
UNICODE_STRING ObjectName;
UNICODE_STRING GuidString;
PWCHAR StartPosition;
PWCHAR EndPosition;
@ -974,7 +966,7 @@ IoSetDeviceInterfaceState(IN PUNICODE_STRING SymbolicLinkName,
DPRINT("IoSetDeviceInterfaceState('%wZ', %d)\n", SymbolicLinkName, Enable);
/* Symbolic link name is ACPI#PNP0501#1#{GUID}\ReferenceString */
/* Symbolic link name is \??\ACPI#PNP0501#1#{GUID}\ReferenceString */
/* Get GUID from SymbolicLinkName */
StartPosition = wcschr(SymbolicLinkName->Buffer, L'{');
EndPosition = wcschr(SymbolicLinkName->Buffer, L'}');
@ -986,24 +978,15 @@ IoSetDeviceInterfaceState(IN PUNICODE_STRING SymbolicLinkName,
GuidString.Buffer = StartPosition;
GuidString.MaximumLength = GuidString.Length = (ULONG_PTR)(EndPosition + 1) - (ULONG_PTR)StartPosition;
/* Create \??\SymbolicLinkName string */
ObjectName.Length = 0;
ObjectName.MaximumLength = SymbolicLinkName->Length + 4 * sizeof(WCHAR);
ObjectName.Buffer = ExAllocatePool(PagedPool, ObjectName.MaximumLength);
if (!ObjectName.Buffer)
return STATUS_INSUFFICIENT_RESOURCES;
RtlAppendUnicodeToString(&ObjectName, L"\\??\\");
RtlAppendUnicodeStringToString(&ObjectName, SymbolicLinkName);
/* Get pointer to the PDO */
Status = IoGetDeviceObjectPointer(&ObjectName,
Status = IoGetDeviceObjectPointer(
SymbolicLinkName,
0, /* DesiredAccess */
&FileObject,
&PhysicalDeviceObject);
if (!NT_SUCCESS(Status))
{
DPRINT("IoGetDeviceObjectPointer() failed with status 0x%08lx\n", Status);
ExFreePool(ObjectName.Buffer);
return Status;
}
@ -1016,7 +999,6 @@ IoSetDeviceInterfaceState(IN PUNICODE_STRING SymbolicLinkName,
(PVOID)SymbolicLinkName);
ObDereferenceObject(FileObject);
ExFreePool(ObjectName.Buffer);
return STATUS_SUCCESS;
}