devutils.c

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/*
 * PROJECT:     ReactOS Setup Library
 * LICENSE:     GPL-2.0-or-later (https://spdx.org/licenses/GPL-2.0-or-later)
 * PURPOSE:     Device utility functions
 * COPYRIGHT:   Copyright 2024 Hermès Bélusca-Maïto <hermes.belusca-maito@reactos.org>
 */
 
#include "precomp.h"
#include "devutils.h"
 
/* FUNCTIONS *****************************************************************/
 
NTSTATUS
pOpenDeviceEx(
    _In_ PCWSTR DevicePath,
    _Out_ PHANDLE DeviceHandle,
    _In_ ACCESS_MASK DesiredAccess,
    _In_ ULONG ShareAccess)
{
    UNICODE_STRING Name;
    OBJECT_ATTRIBUTES ObjectAttributes;
    IO_STATUS_BLOCK IoStatusBlock;
 
    RtlInitUnicodeString(&Name, DevicePath);
    InitializeObjectAttributes(&ObjectAttributes,
                               &Name,
                               OBJ_CASE_INSENSITIVE,
                               NULL,
                               NULL);
    return NtOpenFile(DeviceHandle,
                      DesiredAccess | SYNCHRONIZE,
                      &ObjectAttributes,
                      &IoStatusBlock,
                      ShareAccess,
                      /* FILE_NON_DIRECTORY_FILE | */
                      FILE_SYNCHRONOUS_IO_NONALERT);
}
 
NTSTATUS
pOpenDevice(
    _In_ PCWSTR DevicePath,
    _Out_ PHANDLE DeviceHandle)
{
    return pOpenDeviceEx(DevicePath,
                         DeviceHandle,
                         FILE_READ_DATA | FILE_READ_ATTRIBUTES,
                         FILE_SHARE_VALID_FLAGS // FILE_SHARE_READ,WRITE,DELETE
                         );
}
 
/* EOF */