Intravision/reactos
1
0
Fork 0
mirror of https://github.com/reactos/reactos.git synced 2025-08-06 10:12:58 +00:00
Code Issues Projects Releases Packages Wiki Activity

Git conversion: Make reactos the root directory, move rosapps, rostests, wallpapers into modules, and delete rossubsys.

Browse source
This commit is contained in:
Colin Finck 2017-10-03 07:45:34 +00:00
parent b94e2d8ca0
commit c2c66aff7d
24198 changed files with 0 additions and 37285 deletions
Download patch file Download diff file Expand all files Collapse all files

153
sdk/lib/smlib/lookupss.c Normal file
View file

@ -0,0 +1,153 @@
/*
* 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 = %lu\n", kvpi->TitleIndex);
DPRINT("kvpi.Type = %lu\n", kvpi->Type);
DPRINT("kvpi.DataLength = %lu\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 = (USHORT)kvpi->DataLength;
Source.MaximumLength = (USHORT)kvpi->DataLength;
Source.Buffer = (PWCHAR) & kvpi->Data;
Destination.Length = 0;
Destination.MaximumLength = (USHORT)(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 */