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[NTOS:IO]

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- Normalize, er.. simplify IopNormalizeImagePath a bit and use pool tagging

svn path=/trunk/; revision=64946
This commit is contained in:
Thomas Faber 2014-10-23 22:05:56 +00:00
parent 3b3996b399
commit 08701eea3f
1 changed files with 21 additions and 17 deletions
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38
reactos/ntoskrnl/io/iomgr/driver.c
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@ -239,39 +239,44 @@ IopNormalizeImagePath(
PUNICODE_STRING ImagePath,
_In_ PUNICODE_STRING ServiceName)
{
UNICODE_STRING SystemRootString = RTL_CONSTANT_STRING(L"\\SystemRoot\\");
UNICODE_STRING DriversPathString = RTL_CONSTANT_STRING(L"\\SystemRoot\\system32\\drivers\\");
UNICODE_STRING DotSysString = RTL_CONSTANT_STRING(L".sys");
UNICODE_STRING InputImagePath;
DPRINT("Normalizing image path '%wZ' for service '%wZ'\n", ImagePath, ServiceName);
RtlCopyMemory(&InputImagePath,
ImagePath,
sizeof(UNICODE_STRING));
InputImagePath = *ImagePath;
if (InputImagePath.Length == 0)
{
ImagePath->Length = 0;
ImagePath->MaximumLength =
(33 * sizeof(WCHAR)) + ServiceName->Length + sizeof(UNICODE_NULL);
ImagePath->Buffer = ExAllocatePool(NonPagedPool,
ImagePath->MaximumLength);
ImagePath->MaximumLength = DriversPathString.Length +
ServiceName->Length +
DotSysString.Length +
sizeof(UNICODE_NULL);
ImagePath->Buffer = ExAllocatePoolWithTag(NonPagedPool,
ImagePath->MaximumLength,
TAG_IO);
if (ImagePath->Buffer == NULL)
return STATUS_NO_MEMORY;
RtlAppendUnicodeToString(ImagePath, L"\\SystemRoot\\system32\\drivers\\");
RtlCopyUnicodeString(ImagePath, &DriversPathString);
RtlAppendUnicodeStringToString(ImagePath, ServiceName);
RtlAppendUnicodeToString(ImagePath, L".sys");
RtlAppendUnicodeStringToString(ImagePath, &DotSysString);
}
else if (InputImagePath.Buffer[0] != L'\\')
{
ImagePath->Length = 0;
ImagePath->MaximumLength =
12 * sizeof(WCHAR) + InputImagePath.Length + sizeof(UNICODE_NULL);
ImagePath->Buffer = ExAllocatePool(NonPagedPool,
ImagePath->MaximumLength);
ImagePath->MaximumLength = SystemRootString.Length +
InputImagePath.Length +
sizeof(UNICODE_NULL);
ImagePath->Buffer = ExAllocatePoolWithTag(NonPagedPool,
ImagePath->MaximumLength,
TAG_IO);
if (ImagePath->Buffer == NULL)
return STATUS_NO_MEMORY;
RtlAppendUnicodeToString(ImagePath, L"\\SystemRoot\\");
RtlCopyUnicodeString(ImagePath, &SystemRootString);
RtlAppendUnicodeStringToString(ImagePath, &InputImagePath);
/* Free caller's string */
@ -319,8 +324,7 @@ IopLoadServiceModule(
ServiceStart = 0;
/* IopNormalizeImagePath will do all of the work for us if we give it an empty string */
ServiceImagePath.Length = ServiceImagePath.MaximumLength = 0;
ServiceImagePath.Buffer = NULL;
RtlInitEmptyUnicodeString(&ServiceImagePath, NULL, 0);
}
else
{