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windows-nt/Source/XPSP1/NT/base/pnp/cfgmgr32/util.c

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/*++
Copyright (c) 1995-2001 Microsoft Corporation
Module Name:
util.c
Abstract:
This module contains general utility routines used by cfgmgr32 code.
INVALID_DEVINST
CopyFixedUpDeviceId
PnPUnicodeToMultiByte
PnPMultiByteToUnicode
PnPRetrieveMachineName
PnPGetVersion
PnPGetGlobalHandles
EnablePnPPrivileges
IsRemoteServiceRunning
Author:
Paula Tomlinson (paulat) 6-22-1995
Environment:
User mode only.
Revision History:
22-Jun-1995 paulat
Creation and initial implementation.
--*/
//
// includes
//
#include "precomp.h"
#include "cfgi.h"
#include "setupapi.h"
#include "spapip.h"
//
// Private prototypes
//
BOOL
EnablePnPPrivileges(
VOID
);
//
// global data
//
extern PVOID hLocalStringTable; // MODIFIED by PnPGetGlobalHandles
extern PVOID hLocalBindingHandle; // MODIFIED by PnPGetGlobalHandles
extern WORD LocalServerVersion; // MODIFIED by PnPGetVersion
extern WCHAR LocalMachineNameNetBIOS[]; // NOT MODIFIED BY THIS FILE
extern CRITICAL_SECTION BindingCriticalSection; // NOT MODIFIED IN THIS FILE
extern CRITICAL_SECTION StringTableCriticalSection; // NOT MODIFIED IN THIS FILE
LUID gLuidLoadDriverPrivilege;
LUID gLuidUndockPrivilege;
BOOL
INVALID_DEVINST(
PWSTR pDeviceID
)
/*++
Routine Description:
This routine attempts a simple check whether the pDeviceID string
returned from StringTableStringFromID is valid or not. It does
this simply by dereferencing the pointer and comparing the first
character in the string against the range of characters for a valid
device id. If the string is valid but it's not an existing device id
then this error will be caught later.
Arguments:
pDeviceID Supplies a pointer to the string to be validated.
Return Value:
If it's invalid it returns TRUE, otherwise it returns FALSE.
--*/
{
BOOL Status = FALSE;
try {
if ((!ARGUMENT_PRESENT(pDeviceID)) ||
(*pDeviceID <= TEXT(' ')) ||
(*pDeviceID > (TCHAR)0x7F) ||
(*pDeviceID == TEXT(','))) {
Status = TRUE;
}
} except(EXCEPTION_EXECUTE_HANDLER) {
Status = TRUE;
}
return Status;
} // INVALID_DEVINST
VOID
CopyFixedUpDeviceId(
OUT LPTSTR DestinationString,
IN LPCTSTR SourceString,
IN DWORD SourceStringLen
)
/*++
Routine Description:
This routine copies a device id, fixing it up as it does the copy.
'Fixing up' means that the string is made upper-case, and that the
following character ranges are turned into underscores (_):
c <= 0x20 (' ')
c > 0x7F
c == 0x2C (',')
(NOTE: This algorithm is also implemented in the Config Manager APIs,
and must be kept in sync with that routine. To maintain device identifier
compatibility, these routines must work the same as Win95.)
Arguments:
DestinationString - Supplies a pointer to the destination string buffer
where the fixed-up device id is to be copied. This buffer must
be large enough to hold a copy of the source string (including
terminating NULL).
SourceString - Supplies a pointer to the (null-terminated) source
string to be fixed up.
SourceStringLen - Supplies the length, in characters, of the source
string (not including terminating NULL).
Return Value:
None.
--*/
{
PTCHAR p;
try {
CopyMemory(DestinationString,
SourceString,
((SourceStringLen + 1) * sizeof(TCHAR)));
CharUpperBuff(DestinationString, SourceStringLen);
for(p = DestinationString; *p; p++) {
if((*p <= TEXT(' ')) ||
(*p > (TCHAR)0x7F) ||
(*p == TEXT(','))) {
*p = TEXT('_');
}
}
} except(EXCEPTION_EXECUTE_HANDLER) {
NOTHING;
}
} // CopyFixedUpDeviceId
CONFIGRET
PnPUnicodeToMultiByte(
IN PWSTR UnicodeString,
IN ULONG UnicodeStringLen,
OUT PSTR AnsiString OPTIONAL,
IN OUT PULONG AnsiStringLen
)
/*++
Routine Description:
Convert a string from unicode to ansi.
Arguments:
UnicodeString - Supplies string to be converted.
UnicodeStringLen - Specifies the size, in bytes, of the string to be
converted.
AnsiString - Optionally, supplies a buffer to receive the ANSI
string.
AnsiStringLen - Supplies the address of a variable that contains the
size, in bytes, of the buffer pointed to by AnsiString.
This API replaces the initial size with the number of
bytes of data copied to the buffer. If the variable is
initially zero, the API replaces it with the buffer size
needed to receive all the registry data. In this case,
the AnsiString parameter is ignored.
Return Value:
Returns a CONFIGRET code.
--*/
{
CONFIGRET Status = CR_SUCCESS;
NTSTATUS ntStatus;
ULONG ulAnsiStringLen = 0;
try {
//
// Validate parameters
//
if ((!ARGUMENT_PRESENT(AnsiStringLen)) ||
(!ARGUMENT_PRESENT(AnsiString)) && (*AnsiStringLen != 0)) {
Status = CR_INVALID_POINTER;
goto Clean0;
}
//
// Determine the size required for the ANSI string representation.
//
ntStatus = RtlUnicodeToMultiByteSize(&ulAnsiStringLen,
UnicodeString,
UnicodeStringLen);
if (!NT_SUCCESS(ntStatus)) {
Status = CR_FAILURE;
goto Clean0;
}
if ((!ARGUMENT_PRESENT(AnsiString)) ||
(*AnsiStringLen < ulAnsiStringLen)) {
*AnsiStringLen = ulAnsiStringLen;
Status = CR_BUFFER_SMALL;
goto Clean0;
}
//
// Perform the conversion.
//
ntStatus = RtlUnicodeToMultiByteN(AnsiString,
*AnsiStringLen,
&ulAnsiStringLen,
UnicodeString,
UnicodeStringLen);
ASSERT(NT_SUCCESS(ntStatus));
ASSERT(ulAnsiStringLen <= *AnsiStringLen);
if (!NT_SUCCESS(ntStatus)) {
Status = CR_FAILURE;
}
*AnsiStringLen = ulAnsiStringLen;
Clean0:
NOTHING;
} except(EXCEPTION_EXECUTE_HANDLER) {
Status = CR_FAILURE;
}
return Status;
} // PnPUnicodeToMultiByte
CONFIGRET
PnPMultiByteToUnicode(
IN PSTR AnsiString,
IN ULONG AnsiStringLen,
OUT PWSTR UnicodeString OPTIONAL,
IN OUT PULONG UnicodeStringLen
)
/*++
Routine Description:
Convert a string from ansi to unicode.
Arguments:
AnsiString - Supplies string to be converted.
AnsiStringLen - Specifies the size, in bytes, of the string to be
converted.
UnicodeString - Optionally, supplies a buffer to receive the Unicode
string.
UnicodeStringLen - Supplies the address of a variable that contains the
size, in bytes, of the buffer pointed to by UnicodeString.
This API replaces the initial size with the number of
bytes of data copied to the buffer. If the variable is
initially zero, the API replaces it with the buffer size
needed to receive all the registry data. In this case,
the UnicodeString parameter is ignored.
Return Value:
Returns a CONFIGRET code.
--*/
{
CONFIGRET Status = CR_SUCCESS;
NTSTATUS ntStatus;
ULONG ulUnicodeStringLen = 0;
try {
//
// Validate parameters
//
if ((!ARGUMENT_PRESENT(UnicodeStringLen)) ||
(!ARGUMENT_PRESENT(UnicodeString)) && (*UnicodeStringLen != 0)) {
Status = CR_INVALID_POINTER;
goto Clean0;
}
//
// Determine the size required for the ANSI string representation.
//
ntStatus = RtlMultiByteToUnicodeSize(&ulUnicodeStringLen,
AnsiString,
AnsiStringLen);
if (!NT_SUCCESS(ntStatus)) {
Status = CR_FAILURE;
goto Clean0;
}
if ((!ARGUMENT_PRESENT(UnicodeString)) ||
(*UnicodeStringLen < ulUnicodeStringLen)) {
*UnicodeStringLen = ulUnicodeStringLen;
Status = CR_BUFFER_SMALL;
goto Clean0;
}
//
// Perform the conversion.
//
ntStatus = RtlMultiByteToUnicodeN(UnicodeString,
*UnicodeStringLen,
&ulUnicodeStringLen,
AnsiString,
AnsiStringLen);
ASSERT(NT_SUCCESS(ntStatus));
ASSERT(ulUnicodeStringLen <= *UnicodeStringLen);
if (!NT_SUCCESS(ntStatus)) {
Status = CR_FAILURE;
}
*UnicodeStringLen = ulUnicodeStringLen;
Clean0:
NOTHING;
} except(EXCEPTION_EXECUTE_HANDLER) {
Status = CR_FAILURE;
}
return Status;
} // PnPMultiByteToUnicode
BOOL
PnPRetrieveMachineName(
IN HMACHINE hMachine,
OUT LPWSTR pszMachineName
)
/*++
Routine Description:
Optimized version of PnPConnect, only returns the machine name
associated with this connection.
Arguments:
hMachine Information about this connection
pszMachineName Returns machine name specified when CM_Connect_Machine
was called.
** This buffer must be at least (MAX_PATH + 3)
characters long. **
Return Value:
Return TRUE if the function succeeds and FALSE if it fails.
--*/
{
BOOL Status = TRUE;
try {
if (hMachine == NULL) {
//
// local machine scenario
//
// use the global local machine name string that was filled
// when the DLL initialized.
//
lstrcpy(pszMachineName, LocalMachineNameNetBIOS);
} else {
//
// remote machine scenario
//
// validate the machine handle.
//
if (((PPNP_MACHINE)hMachine)->ulSignature != (ULONG)MACHINE_HANDLE_SIGNATURE) {
Status = FALSE;
goto Clean0;
}
//
// use information within the hMachine handle to fill in the
// machine name. The hMachine info was set on a previous call
// to CM_Connect_Machine.
//
lstrcpy(pszMachineName, ((PPNP_MACHINE)hMachine)->szMachineName);
}
Clean0:
NOTHING;
} except(EXCEPTION_EXECUTE_HANDLER) {
Status = FALSE;
}
return Status;
} // PnPRetrieveMachineName
BOOL
PnPGetVersion(
IN HMACHINE hMachine,
IN WORD * pwVersion
)
/*++
Routine Description:
This routine returns the internal server version for the specified machine
connection, as returned by the RPC server interface routine
PNP_GetVersionInternal. If the PNP_GetVersionInternal interface does not
exist on the specified machine, this routine returns the version as reported
by PNP_GetVersion.
Arguments:
hMachine - Information about this connection
pwVersion - Receives the internal server version.
Return Value:
Return TRUE if the function succeeds and FALSE if it fails.
Notes:
The version reported by PNP_GetVersion is defined to be constant, at 0x0400.
The version returned by PNP_GetVersionInternal may change with each release
of the product, starting with 0x0501 for Windows NT 5.1.
--*/
{
BOOL Status = TRUE;
handle_t hBinding = NULL;
CONFIGRET crStatus;
WORD wVersionInternal;
try {
if (pwVersion == NULL) {
return FALSE;
}
if (hMachine == NULL) {
//
// local machine scenario
//
if (LocalServerVersion != 0) {
//
// local server version has already been retrieved.
//
*pwVersion = LocalServerVersion;
} else {
//
// retrieve binding handle for the local machine.
//
if (!PnPGetGlobalHandles(hMachine, NULL, &hBinding)) {
return FALSE;
}
ASSERT(hBinding);
//
// initialize the version supplied to the internal client
// version, in case the server wants to adjust the response
// based on the client version.
//
wVersionInternal = (WORD)CFGMGR32_VERSION_INTERNAL;
RpcTryExcept {
//
// call rpc service entry point
//
crStatus = PNP_GetVersionInternal(
hBinding, // rpc binding
&wVersionInternal); // internal server version
}
RpcExcept (I_RpcExceptionFilter(RpcExceptionCode())) {
KdPrintEx((DPFLTR_PNPMGR_ID,
DBGF_WARNINGS,
"PNP_GetVersionInternal caused an exception (%d)\n",
RpcExceptionCode()));
crStatus = MapRpcExceptionToCR(RpcExceptionCode());
}
RpcEndExcept
if (crStatus == CR_SUCCESS) {
//
// PNP_GetVersionInternal exists on NT 5.1 and later.
//
ASSERT(wVersionInternal >= (WORD)0x0501);
//
// initialize the global local server version.
//
LocalServerVersion = *pwVersion = wVersionInternal;
} else {
//
// we successfully retrieved a local binding handle, but
// PNP_GetVersionInternal failed for some reason other than
// the server not being available.
//
ASSERT(0);
//
// although we know this version of the client should match
// a version of the server where PNP_GetVersionInternal is
// available, it's technically possible (though unsupported)
// that this client is communicating with a downlevel server
// on the local machine, so we'll have to resort to calling
// PNP_GetVersion.
//
RpcTryExcept {
//
// call rpc service entry point
//
crStatus = PNP_GetVersion(
hBinding, // rpc binding
&wVersionInternal); // server version
}
RpcExcept (I_RpcExceptionFilter(RpcExceptionCode())) {
KdPrintEx((DPFLTR_PNPMGR_ID,
DBGF_WARNINGS,
"PNP_GetVersion caused an exception (%d)\n",
RpcExceptionCode()));
crStatus = MapRpcExceptionToCR(RpcExceptionCode());
}
RpcEndExcept
if (crStatus == CR_SUCCESS) {
//
// PNP_GetVersion should always return 0x0400 on all servers.
//
ASSERT(wVersionInternal == (WORD)0x0400);
//
// initialize the global local server version.
//
LocalServerVersion = *pwVersion = wVersionInternal;
} else {
//
// nothing more we can do here but fail.
//
ASSERT(0);
Status = FALSE;
}
}
}
} else {
//
// remote machine scenario
//
// validate the machine handle.
//
if (((PPNP_MACHINE)hMachine)->ulSignature != (ULONG)MACHINE_HANDLE_SIGNATURE) {
return FALSE;
}
//
// use information within the hMachine handle to fill in the
// version. The hMachine info was set on a previous call to
// CM_Connect_Machine.
//
*pwVersion = ((PPNP_MACHINE)hMachine)->wVersion;
}
} except(EXCEPTION_EXECUTE_HANDLER) {
Status = FALSE;
}
return Status;
} // PnPGetVersion
BOOL
PnPGetGlobalHandles(
IN HMACHINE hMachine,
OUT PVOID *phStringTable, OPTIONAL
OUT PVOID *phBindingHandle OPTIONAL
)
/*++
Routine Description:
This routine retrieves a handle to the string table and/or the rpc binding
handle for the specified server machine connection.
Arguments:
hMachine - Specifies a server machine connection handle, as returned
by CM_Connect_Machine.
phStringTable - Optionally, specifies an address to receive a handle to
the string table for the specified server machine
connection.
phBindingHandle - Optionally, specifies an address to receive the RPC
binding handle for the specifies server machine
connection.
Return value:
Returns TRUE if successful, FALSE otherwise.
--*/
{
BOOL bStatus = TRUE;
try {
EnablePnPPrivileges();
if (phStringTable != NULL) {
if (hMachine == NULL) {
//------------------------------------------------------
// Retrieve String Table Handle for the local machine
//-------------------------------------------------------
EnterCriticalSection(&StringTableCriticalSection);
if (hLocalStringTable != NULL) {
//
// local string table has already been created
//
*phStringTable = hLocalStringTable;
} else {
//
// first time, initialize the local string table
//
hLocalStringTable = pSetupStringTableInitialize();
if (hLocalStringTable == NULL) {
bStatus = FALSE;
*phStringTable = NULL;
KdPrintEx((DPFLTR_PNPMGR_ID,
DBGF_ERRORS,
"CFGMGR32: failed to initialize local string table\n"));
goto Clean0;
}
//
// No matter how the string table is implemented, I never
// want to have a string id of zero - this would generate
// an invalid devinst. So, add a small priming string just
// to be safe.
//
pSetupStringTableAddString(hLocalStringTable,
PRIMING_STRING,
STRTAB_CASE_SENSITIVE);
*phStringTable = hLocalStringTable;
}
LeaveCriticalSection(&StringTableCriticalSection);
} else {
//-------------------------------------------------------
// Retrieve String Table Handle for the remote machine
//-------------------------------------------------------
//
// validate the machine handle.
//
if (((PPNP_MACHINE)hMachine)->ulSignature != (ULONG)MACHINE_HANDLE_SIGNATURE) {
bStatus = FALSE;
goto Clean0;
}
//
// use information within the hMachine handle to set the string
// table handle. The hMachine info was set on a previous call
// to CM_Connect_Machine.
//
*phStringTable = ((PPNP_MACHINE)hMachine)->hStringTable;
}
}
if (phBindingHandle != NULL) {
if (hMachine == NULL) {
//-------------------------------------------------------
// Retrieve Binding Handle for the local machine
//-------------------------------------------------------
EnterCriticalSection(&BindingCriticalSection);
if (hLocalBindingHandle != NULL) {
//
// local binding handle has already been set
//
*phBindingHandle = hLocalBindingHandle;
} else {
//
// first time, explicitly force binding to local machine
//
pnp_handle = PNP_HANDLE_bind(NULL); // set rpc global
if (pnp_handle == NULL) {
bStatus = FALSE;
*phBindingHandle = NULL;
KdPrintEx((DPFLTR_PNPMGR_ID,
DBGF_ERRORS,
"CFGMGR32: failed to initialize local binding handle\n"));
goto Clean0;
}
*phBindingHandle = hLocalBindingHandle = (PVOID)pnp_handle;
}
LeaveCriticalSection(&BindingCriticalSection);
} else {
//-------------------------------------------------------
// Retrieve Binding Handle for the remote machine
//-------------------------------------------------------
//
// validate the machine handle.
//
if (((PPNP_MACHINE)hMachine)->ulSignature != (ULONG)MACHINE_HANDLE_SIGNATURE) {
bStatus = FALSE;
goto Clean0;
}
//
// use information within the hMachine handle to set the
// binding handle. The hMachine info was set on a previous call
// to CM_Connect_Machine.
//
*phBindingHandle = ((PPNP_MACHINE)hMachine)->hBindingHandle;
}
}
Clean0:
NOTHING;
} except(EXCEPTION_EXECUTE_HANDLER) {
bStatus = FALSE;
}
return bStatus;
} // PnpGetGlobalHandles
BOOL
EnablePnPPrivileges(
VOID
)
/*++
Routine Description:
This routine attempts to enable the SE_LOAD_DRIVER_NAME and SE_UNDOCK_NAME
privileges in either the thread token or the calling thread (if
impersonating), or thread's process token if no thread token exists.
Arguments:
None.
Return value:
Returns TRUE if successful, FALSE otherwise.
Notes:
Note that this routine can return successfully even if either the
SE_LOAD_DRIVER_NAME or SE_UNDOCK_NAME (or both) privileges were not
successfully enabled in the appropriate token.
If sucessful, to determine whether the function adjusted all of the
specified privileges, call GetLastError to determine the last error set by
AdjustTokenPrivileges, which returns one of the following values when the
function succeeds:
ERROR_SUCCESS - The function adjusted all specified privileges.
ERROR_NOT_ALL_ASSIGNED - The token does not have one or more of the
privileges enabled.
--*/
{
HANDLE hToken;
PTOKEN_PRIVILEGES lpTokenPrivs;
BOOL bSuccess;
if (gLuidLoadDriverPrivilege.LowPart == 0 &&
gLuidLoadDriverPrivilege.HighPart == 0) {
bSuccess = LookupPrivilegeValue( NULL,
SE_LOAD_DRIVER_NAME,
&gLuidLoadDriverPrivilege);
if (!bSuccess) {
KdPrintEx((DPFLTR_PNPMGR_ID,
DBGF_ERRORS,
"CFGMGR32: LookupPrivilegeValue failed, error = %d\n",
GetLastError()));
return FALSE;
}
}
if (gLuidUndockPrivilege.LowPart == 0 && gLuidUndockPrivilege.HighPart == 0) {
bSuccess = LookupPrivilegeValue( NULL,
SE_UNDOCK_NAME,
&gLuidUndockPrivilege);
if (!bSuccess) {
KdPrintEx((DPFLTR_PNPMGR_ID,
DBGF_ERRORS,
"CFGMGR32: LookupPrivilegeValue failed, error = %d\n",
GetLastError()));
return FALSE;
}
}
if (!OpenThreadToken(GetCurrentThread(), TOKEN_ADJUST_PRIVILEGES, TRUE, &hToken)) {
if (GetLastError() == ERROR_NO_TOKEN) {
if (!OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES, &hToken)) {
KdPrintEx((DPFLTR_PNPMGR_ID,
DBGF_ERRORS,
"CFGMGR32: OpenProcessToken returned %d\n",
GetLastError()));
return FALSE;
}
} else {
KdPrintEx((DPFLTR_PNPMGR_ID,
DBGF_ERRORS,
"CFGMGR32: OpenThreadToken returned %d\n",
GetLastError()));
return FALSE;
}
}
lpTokenPrivs = pSetupMalloc(sizeof(TOKEN_PRIVILEGES) + sizeof(LUID_AND_ATTRIBUTES));
if (lpTokenPrivs == NULL) {
CloseHandle(hToken);
return FALSE;
}
lpTokenPrivs->PrivilegeCount = 2;
lpTokenPrivs->Privileges[0].Luid = gLuidLoadDriverPrivilege;
lpTokenPrivs->Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
lpTokenPrivs->Privileges[1].Luid = gLuidUndockPrivilege;
lpTokenPrivs->Privileges[1].Attributes = SE_PRIVILEGE_ENABLED;
bSuccess = AdjustTokenPrivileges( hToken,
FALSE, // DisableAllPrivileges
lpTokenPrivs,
0,
(PTOKEN_PRIVILEGES) NULL,
(PDWORD) NULL);
if (!bSuccess) {
KdPrintEx((DPFLTR_PNPMGR_ID,
DBGF_ERRORS,
"CFGMGR32: AdjustTokenPrivileges failed: %u\n",
GetLastError()));
}
pSetupFree(lpTokenPrivs);
CloseHandle(hToken);
return bSuccess;
} // EnablePnPPrivileges
BOOL
IsRemoteServiceRunning(
IN LPCWSTR UNCServerName,
IN LPCWSTR ServiceName
)
/*++
Routine Description:
This routine connects to the active service database of the Service Control
Manager (SCM) on the machine specified and returns whether or not the
specified service is running.
Arguments:
UNCServerName - Specifies the name of the remote machine.
ServiceName - Specifies the name of the service whose status is to be
queried.
Return value:
Returns TRUE if the specified service is installed on the remote machine and
is currently in the SERVICE_RUNNING state, FALSE otherwise.
--*/
{
BOOL Status = FALSE;
SC_HANDLE hSCManager = NULL, hService = NULL;
SERVICE_STATUS ServiceStatus;
//
// Open the Service Control Manager
//
hSCManager = OpenSCManager(
UNCServerName, // computer name
SERVICES_ACTIVE_DATABASE, // SCM database name
SC_MANAGER_CONNECT // access type
);
if (hSCManager == NULL) {
KdPrintEx((DPFLTR_PNPMGR_ID,
DBGF_WARNINGS,
"CFGMGR32: OpenSCManager failed, error = %d\n",
GetLastError()));
return FALSE;
}
//
// Open the service
//
hService = OpenService(
hSCManager, // handle to SCM database
ServiceName, // service name
SERVICE_QUERY_STATUS // access type
);
if (hService == NULL) {
Status = FALSE;
KdPrintEx((DPFLTR_PNPMGR_ID,
DBGF_WARNINGS,
"CFGMGR32: OpenService failed, error = %d\n",
GetLastError()));
goto Clean0;
}
//
// Query the service status
//
if (!QueryServiceStatus(hService,
&ServiceStatus)) {
Status = FALSE;
KdPrintEx((DPFLTR_PNPMGR_ID,
DBGF_WARNINGS,
"CFGMGR32: QueryServiceStatus failed, error = %d\n",
GetLastError()));
goto Clean0;
}
//
// Check if the service is running.
//
if (ServiceStatus.dwCurrentState == SERVICE_RUNNING) {
Status = TRUE;
}
Clean0:
if (hService) {
CloseServiceHandle(hService);
}
if (hSCManager) {
CloseServiceHandle(hSCManager);
}
return Status;
} // IsRemoteServiceRunning
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