+++ /dev/null
-/* $Id$
- *
- * COPYRIGHT: See COPYING in the top level directory
- * PROJECT: ReactOS system libraries
- * FILE: lib/smlib/lookupss.c
- */
-#include "precomp.h"
-
-#define NDEBUG
-#include <debug.h>
-
-/**********************************************************************
- * NAME EXPORTED
- * SmLookupSubsystem/6
- *
- * DESCRIPTION
- * Read from the registry key
- * \Registry\SYSTEM\CurrentControlSet\Control\Session Manager\Subsystems
- * the value which name is Name.
- *
- * ARGUMENTS
- * Name: name of the program to run, that is a value's name in
- * the SM registry key Subsystems;
- * Data: what the registry gave back for Name;
- * DataLength: how much Data the registry returns;
- * DataType: what is Data?
- * Environment: set it if you want this function to use it
- * to possibly expand Data before giving it back; if set
- * to NULL, no expansion will be performed.
- */
-NTSTATUS WINAPI
-SmLookupSubsystem (IN PWSTR Name,
- IN OUT PWSTR Data,
- IN OUT PULONG DataLength,
- IN OUT PULONG DataType,
- IN PVOID Environment OPTIONAL)
-{
- NTSTATUS Status = STATUS_SUCCESS;
- UNICODE_STRING usKeyName = { 0, 0, NULL };
- OBJECT_ATTRIBUTES Oa = {0};
- HANDLE hKey = (HANDLE) 0;
-
- DPRINT("SM: %s(Name='%S') called\n", __FUNCTION__, Name);
- /*
- * Prepare the key name to scan and
- * related object attributes.
- */
- RtlInitUnicodeString (& usKeyName,
- L"\\Registry\\Machine\\SYSTEM\\CurrentControlSet\\Control\\Session Manager\\SubSystems");
-
- InitializeObjectAttributes (& Oa,
- & usKeyName,
- OBJ_CASE_INSENSITIVE,
- NULL,
- NULL);
- /*
- * Open the key. This MUST NOT fail, if the
- * request is for a legitimate subsystem.
- */
- Status = NtOpenKey (& hKey,
- MAXIMUM_ALLOWED,
- & Oa);
- if(NT_SUCCESS(Status))
- {
- UNICODE_STRING usValueName = { 0, 0, NULL };
- PWCHAR KeyValueInformation = NULL;
- ULONG KeyValueInformationLength = 1024;
- ULONG ResultLength = 0L;
- PKEY_VALUE_PARTIAL_INFORMATION kvpi = NULL;
-
- KeyValueInformation = RtlAllocateHeap (RtlGetProcessHeap(),
- 0,
- KeyValueInformationLength);
- if (NULL == KeyValueInformation)
- {
- return STATUS_NO_MEMORY;
- }
- kvpi = (PKEY_VALUE_PARTIAL_INFORMATION) KeyValueInformation;
- RtlInitUnicodeString (& usValueName, Name);
- Status = NtQueryValueKey (hKey,
- & usValueName,
- KeyValuePartialInformation,
- KeyValueInformation,
- KeyValueInformationLength,
- & ResultLength);
- if(NT_SUCCESS(Status))
- {
- DPRINT("nkvpi.TitleIndex = %ld\n", kvpi->TitleIndex);
- DPRINT("kvpi.Type = %ld\n", kvpi->Type);
- DPRINT("kvpi.DataLength = %ld\n", kvpi->DataLength);
-
- if((NULL != Data) && (NULL != DataLength) && (NULL != DataType))
- {
- *DataType = kvpi->Type;
- if((NULL != Environment) && (REG_EXPAND_SZ == *DataType))
- {
- UNICODE_STRING Source;
- PWCHAR DestinationBuffer = NULL;
- UNICODE_STRING Destination;
- ULONG Length = 0;
-
- DPRINT("SM: %s: value will be expanded\n", __FUNCTION__);
-
- DestinationBuffer = RtlAllocateHeap (RtlGetProcessHeap(),
- 0,
- (2 * KeyValueInformationLength));
- if (NULL == DestinationBuffer)
- {
- Status = STATUS_NO_MEMORY;
- }
- else
- {
- Source.Length = kvpi->DataLength;
- Source.MaximumLength = kvpi->DataLength;
- Source.Buffer = (PWCHAR) & kvpi->Data;
-
- Destination.Length = 0;
- Destination.MaximumLength = (2 * KeyValueInformationLength);
- Destination.Buffer = DestinationBuffer;
-
- Status = RtlExpandEnvironmentStrings_U (Environment,
- & Source,
- & Destination,
- & Length);
- if(NT_SUCCESS(Status))
- {
- *DataLength = min(*DataLength, Destination.Length);
- RtlCopyMemory (Data, Destination.Buffer, *DataLength);
- }
- RtlFreeHeap (RtlGetProcessHeap(), 0, DestinationBuffer);
- }
- }else{
- DPRINT("SM: %s: value won't be expanded\n", __FUNCTION__);
- *DataLength = min(*DataLength, kvpi->DataLength);
- RtlCopyMemory (Data, & kvpi->Data, *DataLength);
- }
- *DataType = kvpi->Type;
- }else{
- DPRINT1("SM: %s: Data or DataLength or DataType is NULL!\n", __FUNCTION__);
- Status = STATUS_INVALID_PARAMETER;
- }
- }else{
- DPRINT1("%s: NtQueryValueKey failed (Status=0x%08lx)\n", __FUNCTION__, Status);
- }
- RtlFreeHeap (RtlGetProcessHeap(), 0, KeyValueInformation);
- NtClose (hKey);
- }else{
- DPRINT1("%s: NtOpenKey failed (Status=0x%08lx)\n", __FUNCTION__, Status);
- }
- return Status;
-}
-
-/* EOF */
projects / reactos.git / blobdiff