/// <summary>
/// Equivalent of InitializeObjectAttributes macro with the exception that you can directly set SQOS.
/// </summary>
public unsafe OBJECT_ATTRIBUTES(UNICODE_STRING *objectName, ObjectAttributes attributes, IntPtr rootDirectory, SECURITY_QUALITY_OF_SERVICE *securityQualityOfService = null)
{
Length = (uint)sizeof(OBJECT_ATTRIBUTES);
RootDirectory = rootDirectory;
ObjectName = objectName;
Attributes = attributes;
SecurityDescriptor = null;
SecurityQualityOfService = securityQualityOfService;
}
internal static unsafe (uint status, IntPtr handle) CreateFile(
ReadOnlySpan <char> path,
IntPtr rootDirectory,
CreateDisposition createDisposition,
DesiredAccess desiredAccess = DesiredAccess.FILE_GENERIC_READ | DesiredAccess.SYNCHRONIZE,
FileShare shareAccess = FileShare.ReadWrite | FileShare.Delete,
FileAttributes fileAttributes = 0,
CreateOptions createOptions = CreateOptions.FILE_SYNCHRONOUS_IO_NONALERT,
ObjectAttributes objectAttributes = ObjectAttributes.OBJ_CASE_INSENSITIVE,
void *eaBuffer = null,
uint eaLength = 0,
long *preallocationSize = null,
SECURITY_QUALITY_OF_SERVICE *securityQualityOfService = null)
{
fixed(char *c = &MemoryMarshal.GetReference(path))
{
UNICODE_STRING name = new UNICODE_STRING
{
Length = checked ((ushort)(path.Length * sizeof(char))),
MaximumLength = checked ((ushort)(path.Length * sizeof(char))),
Buffer = (IntPtr)c
};
OBJECT_ATTRIBUTES attributes = new OBJECT_ATTRIBUTES(
&name,
objectAttributes,
rootDirectory,
securityQualityOfService);
IntPtr handle;
IO_STATUS_BLOCK statusBlock;
uint status = NtCreateFile(
&handle,
desiredAccess,
&attributes,
&statusBlock,
AllocationSize: preallocationSize,
fileAttributes,
shareAccess,
createDisposition,
createOptions,
eaBuffer,
eaLength);
return(status, handle);
}
}
