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Fix string returned by IoRegisterDeviceInterface()

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svn path=/trunk/; revision=15899
This commit is contained in:
Hervé Poussineau 2005-06-13 21:44:32 +00:00
parent d520f41934
commit a189416191
1 changed files with 32 additions and 7 deletions
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39
reactos/ntoskrnl/io/deviface.c
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@ -830,6 +830,7 @@ IoRegisterDeviceInterface(
}
/* Write symbolic link name in registry */
SymbolicLinkName->Buffer[1] = '\\';
Status = ZwSetValueKey(
SubKey,
&SymbolicLink,
@ -843,6 +844,14 @@ IoRegisterDeviceInterface(
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);
ZwClose(SubKey);
ZwClose(InterfaceKey);
ZwClose(ClassKey);
@ -864,6 +873,7 @@ IoSetDeviceInterfaceState(
{
PDEVICE_OBJECT PhysicalDeviceObject;
PFILE_OBJECT FileObject;
UNICODE_STRING ObjectName;
UNICODE_STRING GuidString;
PWCHAR StartPosition;
PWCHAR EndPosition;
@ -873,14 +883,8 @@ IoSetDeviceInterfaceState(
return STATUS_INVALID_PARAMETER_1;
DPRINT("IoSetDeviceInterfaceState('%wZ', %d)\n", SymbolicLinkName, Enable);
Status = IoGetDeviceObjectPointer(SymbolicLinkName,
0, /* DesiredAccess */
&FileObject,
&PhysicalDeviceObject);
if (!NT_SUCCESS(Status))
return Status;
/* 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'}');
@ -889,6 +893,26 @@ IoSetDeviceInterfaceState(
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,
0, /* DesiredAccess */
&FileObject,
&PhysicalDeviceObject);
if (!NT_SUCCESS(Status))
{
ExFreePool(ObjectName.Buffer);
return Status;
}
IopNotifyPlugPlayNotification(
PhysicalDeviceObject,
EventCategoryDeviceInterfaceChange,
@ -897,6 +921,7 @@ IoSetDeviceInterfaceState(
(PVOID)SymbolicLinkName);
ObDereferenceObject(FileObject);
ExFreePool(ObjectName.Buffer);
return STATUS_SUCCESS;
}