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144 lines
2.4 KiB
144 lines
2.4 KiB
/*++
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Copyright (c) 2000-2001 Microsoft Corporation
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Module Name:
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Internal.cpp
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Abstract:
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Common functions that use internals.
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Notes:
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None
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History:
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01/10/2000 linstev Created
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08/14/2001 robkenny Moved code inside the ShimLib namespace.
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--*/
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#include <nt.h>
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#include <ntrtl.h>
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#include <windef.h>
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#include "StrSafe.h"
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namespace ShimLib
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{
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/*++
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Function Description:
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Determine the device type from an open handle.
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Arguments:
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IN hFile - Handle to an open file
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Return Value:
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Same as GetDriveType
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History:
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01/10/2000 linstev Updated
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--*/
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// These are in winbase, which we don't want to include
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#define DRIVE_UNKNOWN 0
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#define DRIVE_NO_ROOT_DIR 1
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#define DRIVE_REMOVABLE 2
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#define DRIVE_FIXED 3
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#define DRIVE_REMOTE 4
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#define DRIVE_CDROM 5
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#define DRIVE_RAMDISK 6
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UINT
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GetDriveTypeFromHandle(HANDLE hFile)
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{
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NTSTATUS Status;
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IO_STATUS_BLOCK IoStatusBlock;
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FILE_FS_DEVICE_INFORMATION DeviceInformation;
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Status = NtQueryVolumeInformationFile(
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hFile,
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&IoStatusBlock,
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&DeviceInformation,
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sizeof(DeviceInformation),
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FileFsDeviceInformation);
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UINT uRet = DRIVE_UNKNOWN;
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if (NT_SUCCESS(Status))
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{
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switch (DeviceInformation.DeviceType)
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{
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case FILE_DEVICE_NETWORK:
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case FILE_DEVICE_NETWORK_FILE_SYSTEM:
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uRet = DRIVE_REMOTE;
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break;
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case FILE_DEVICE_CD_ROM:
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case FILE_DEVICE_CD_ROM_FILE_SYSTEM:
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uRet = DRIVE_CDROM;
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break;
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case FILE_DEVICE_VIRTUAL_DISK:
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uRet = DRIVE_RAMDISK;
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break;
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case FILE_DEVICE_DISK:
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case FILE_DEVICE_DISK_FILE_SYSTEM:
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if (DeviceInformation.Characteristics & FILE_REMOVABLE_MEDIA)
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{
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uRet = DRIVE_REMOVABLE;
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}
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else
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{
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uRet = DRIVE_FIXED;
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}
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break;
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default:
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uRet = DRIVE_UNKNOWN;
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break;
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}
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}
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return uRet;
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}
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/*++
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Function Description:
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Cause a break
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Arguments:
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None
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Return Value:
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None
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History:
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10/25/2000 linstev Added this comment
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--*/
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void APPBreakPoint(void)
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{
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DbgBreakPoint();
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}
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}; // end of namespace ShimLib
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