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/*++
Copyright (c) 1992 Microsoft Corporation
Module Name:
prodtype.c
Abstract:
This module defines a function to determine the product type.
Author:
Cliff Van Dyke (CliffV) 20-Mar-1992
Revision History:
--*/
#include "ntrtlp.h"
#if defined(ALLOC_PRAGMA) && defined(NTOS_KERNEL_RUNTIME)
#pragma alloc_text(PAGE,RtlGetNtProductType)
#endif
BOOLEAN
RtlGetNtProductType(
OUT PNT_PRODUCT_TYPE NtProductType
)
/*++
Routine Description:
Returns the product type of the current system.
Arguments:
NtProductType - Returns the product type. Either NtProductWinNt or
NtProductLanManNt.
Return Value:
TRUE on success, FALSE on failure
The product type will be set to WinNt on failure
--*/
{
NTSTATUS Status;
OBJECT_ATTRIBUTES ObjectAttributes;
HANDLE KeyHandle;
PKEY_VALUE_FULL_INFORMATION KeyValueInformation;
ULONG KeyValueInfoLength;
ULONG ResultLength;
UNICODE_STRING KeyPath;
UNICODE_STRING ValueName;
UNICODE_STRING Value;
UNICODE_STRING WinNtValue;
UNICODE_STRING LanmanNtValue;
UNICODE_STRING ServerNtValue;
BOOLEAN Result;
RTL_PAGED_CODE();
//
// if we are in gui setup mode, product type is read from the registry since
// gui setup mode is the only time product type can be changed.
// All other times, the "captured at boot" version of product type is used
//
if ( USER_SHARED_DATA->ProductTypeIsValid ) {
*NtProductType = USER_SHARED_DATA->NtProductType;
return TRUE;
}
//
// Prepare default value for failure case
//
*NtProductType = NtProductWinNt;
Result = FALSE;
RtlInitUnicodeString( &KeyPath, L"\\Registry\\Machine\\System\\CurrentControlSet\\Control\\ProductOptions" );
RtlInitUnicodeString( &ValueName, L"ProductType" );
InitializeObjectAttributes( &ObjectAttributes,
&KeyPath,
OBJ_CASE_INSENSITIVE,
NULL,
NULL
);
Status = NtOpenKey( &KeyHandle,
MAXIMUM_ALLOWED,
&ObjectAttributes
);
KeyValueInformation = NULL;
if (NT_SUCCESS( Status )) {
KeyValueInfoLength = 256;
KeyValueInformation = RtlAllocateHeap( RtlProcessHeap(), 0,
KeyValueInfoLength
);
if (KeyValueInformation == NULL) {
Status = STATUS_NO_MEMORY;
} else {
Status = NtQueryValueKey( KeyHandle,
&ValueName,
KeyValueFullInformation,
KeyValueInformation,
KeyValueInfoLength,
&ResultLength
);
}
} else {
KeyHandle = NULL;
}
if (NT_SUCCESS( Status ) && KeyValueInformation->Type == REG_SZ) {
//
// Decide which product we are installed as
//
Value.Buffer = (PWSTR)((PCHAR)KeyValueInformation + KeyValueInformation->DataOffset);
Value.Length = (USHORT)(KeyValueInformation->DataLength - sizeof( UNICODE_NULL ));
Value.MaximumLength = (USHORT)(KeyValueInformation->DataLength);
RtlInitUnicodeString(&WinNtValue, L"WinNt");
RtlInitUnicodeString(&LanmanNtValue, L"LanmanNt");
RtlInitUnicodeString(&ServerNtValue, L"ServerNt");
if (RtlEqualUnicodeString(&Value, &WinNtValue, TRUE)) {
*NtProductType = NtProductWinNt;
Result = TRUE;
} else if (RtlEqualUnicodeString(&Value, &LanmanNtValue, TRUE)) {
*NtProductType = NtProductLanManNt;
Result = TRUE;
} else if (RtlEqualUnicodeString(&Value, &ServerNtValue, TRUE)) {
*NtProductType = NtProductServer;
Result = TRUE;
} else {
#if DBG
DbgPrint("RtlGetNtProductType: Product type unrecognised <%wZ>\n", &Value);
#endif // DBG
}
} else {
#if DBG
DbgPrint("RtlGetNtProductType: %wZ\\%wZ not found or invalid type\n", &KeyPath, &ValueName );
#endif // DBG
}
//
// Clean up our resources.
//
if (KeyValueInformation != NULL) {
RtlFreeHeap( RtlProcessHeap(), 0, KeyValueInformation );
}
if (KeyHandle != NULL) {
NtClose( KeyHandle );
}
//
// Return result.
//
return(Result);
}
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