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[UMPNPMGR] PNP_GetDeviceList: Implement the enumeration of service device instances.

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This commit is contained in:
Eric Kohl 2018-12-31 21:37:48 +01:00
parent a825774096
commit 66e4dbc7ed
1 changed files with 109 additions and 2 deletions
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111
base/services/umpnpmgr/umpnpmgr.c
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@ -587,7 +587,115 @@ GetServiceInstanceList(
_Inout_ PWSTR pszBuffer,
_Inout_ PDWORD pulLength)
{
return CR_CALL_NOT_IMPLEMENTED;
WCHAR szPathBuffer[512];
WCHAR szName[16];
HKEY hServicesKey = NULL, hServiceKey = NULL, hEnumKey = NULL;
DWORD dwValues, dwSize, dwIndex, dwUsedLength, dwPathLength;
DWORD dwError;
PWSTR pPtr;
CONFIGRET ret = CR_SUCCESS;
/* Open the device key */
dwError = RegOpenKeyExW(HKEY_LOCAL_MACHINE,
L"System\\CurrentControlSet\\Services",
0,
KEY_READ,
&hServicesKey);
if (dwError != ERROR_SUCCESS)
{
DPRINT("Failed to open the services key (Error %lu)\n", dwError);
return CR_REGISTRY_ERROR;
}
dwError = RegOpenKeyExW(hServicesKey,
pszService,
0,
KEY_READ,
&hServiceKey);
if (dwError != ERROR_SUCCESS)
{
DPRINT("Failed to open the service key (Error %lu)\n", dwError);
ret = CR_REGISTRY_ERROR;
goto Done;
}
dwError = RegOpenKeyExW(hServiceKey,
L"Enum",
0,
KEY_READ,
&hEnumKey);
if (dwError != ERROR_SUCCESS)
{
DPRINT("Failed to open the service enum key (Error %lu)\n", dwError);
ret = CR_REGISTRY_ERROR;
goto Done;
}
/* Retrieve the number of device instances */
dwSize = sizeof(DWORD);
dwError = RegQueryValueExW(hEnumKey,
L"Count",
NULL,
NULL,
(LPBYTE)&dwValues,
&dwSize);
if (dwError != ERROR_SUCCESS)
{
DPRINT("RegQueryValueExW failed (Error %lu)\n", dwError);
dwValues = 1;
}
DPRINT("dwValues %lu\n", dwValues);
dwUsedLength = 0;
pPtr = pszBuffer;
for (dwIndex = 0; dwIndex < dwValues; dwIndex++)
{
wsprintf(szName, L"%lu", dwIndex);
dwSize = sizeof(szPathBuffer);
dwError = RegQueryValueExW(hEnumKey,
szName,
NULL,
NULL,
(LPBYTE)szPathBuffer,
&dwSize);
if (dwError != ERROR_SUCCESS)
break;
DPRINT("Path: %S\n", szPathBuffer);
dwPathLength = wcslen(szPathBuffer) + 1;
if (dwUsedLength + dwPathLength + 1 > *pulLength)
{
ret = CR_BUFFER_SMALL;
break;
}
wcscpy(pPtr, szPathBuffer);
dwUsedLength += dwPathLength;
pPtr += dwPathLength;
*pPtr = UNICODE_NULL;
}
Done:
if (hEnumKey != NULL)
RegCloseKey(hEnumKey);
if (hServiceKey != NULL)
RegCloseKey(hServiceKey);
if (hServicesKey != NULL)
RegCloseKey(hServicesKey);
if (ret == CR_SUCCESS)
*pulLength = dwUsedLength + 1;
else
*pulLength = 0;
return ret;
}
@ -824,7 +932,6 @@ PNP_GetDeviceList(
ret = GetServiceInstanceList(pszFilter,
Buffer,
pulLength);
ret = CR_CALL_NOT_IMPLEMENTED;
}
else if (ulFlags & CM_GETIDLIST_FILTER_ENUMERATOR)
{