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i see a picture about different type of handle in windows.
how to Get the type of a handle
NtQueryObject with ObjectTypeInformation
i tried this api, and printf the typeName value like this
bool GetObjectInfoByHandle(HANDLE handle){
if (handle == NULL || handle == INVALID_HANDLE_VALUE) {
return false;
}
void* pObjectTypeInfo = NULL;
unsigned long size = 0;
NTSTATUS status = STATUS_INFO_LENGTH_MISMATCH;
FARPROC NtQueryObject_funcptr = GetProcAddress(GetModuleHandle("ntdll.dll"), "NtQueryObject");
for(int i = 0; i<10 && status == STATUS_INFO_LENGTH_MISMATCH;i++) {
pObjectTypeInfo = malloc(size);
status = NtQueryObject_funcptr(handle, ObjectTypeInformation, pObjectTypeInfo, size, &size);
if (!NT_SUCCESS(status)) {
free(pObjectTypeInfo);
}
}
if (!NT_SUCCESS(status)) {
return false;
}
wprintf(L"fei: %ws \n", (const char *) ((PPUBLIC_OBJECT_TYPE_INFORMATION) pObjectTypeInfo)->TypeName.Buffer);
return true;
}
int main()
{
//GetSystemHandle();
HANDLE hReadPipe = NULL;
HANDLE hWritePipe = NULL;
CreatePipe(&hReadPipe, &hWritePipe, NULL, 0);
GetObjectInfoByHandle(hReadPipe);
GetObjectInfoByHandle(hWritePipe);
}
print result is handleType: File , Shouldn't it be pipe
anything wrong?
"Pipe" is not in the list of object types (can be seen in WinObj from Sysinternals or ObjectTypesInformation & OBJECT_TYPES_INFORMATION)
thks， however
Is there any other way to determine whether a handle is a file or a pipe
sorry I have some misunderstandings about handles and objects。
my question is Can I use handle to get the type of the object to which the handle points to
Is there any other way to determine whether a handle is a file or a pipe
thks
it works