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[UMPNPMGR] PNP_GetDeviceList: Implement the enumeration of device instances for a given enumerator.

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This commit is contained in:
Eric Kohl 2018-12-30 12:55:31 +01:00
parent 71fefa32db
commit 4f37d96857
1 changed files with 74 additions and 1 deletions
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75
base/services/umpnpmgr/umpnpmgr.c
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@ -544,6 +544,7 @@ GetDeviceInstanceList(
PWSTR pPtr;
CONFIGRET ret = CR_SUCCESS;
/* Open the device key */
dwError = RegOpenKeyExW(hEnumKey,
pszDevice,
0,
@ -600,6 +601,76 @@ GetDeviceInstanceList(
}
CONFIGRET
GetEnumeratorInstanceList(
_In_ PWSTR pszEnumerator,
_Inout_ PWSTR pszBuffer,
_Inout_ PDWORD pulLength)
{
WCHAR szDeviceBuffer[MAX_DEVICE_ID_LEN];
WCHAR szPathBuffer[512];
HKEY hEnumeratorKey;
PWSTR pPtr;
DWORD dwIndex, dwDeviceLength, dwUsedLength, dwRemainingLength, dwPathLength;
DWORD dwError;
CONFIGRET ret = CR_SUCCESS;
/* Open the enumerator key */
dwError = RegOpenKeyExW(hEnumKey,
pszEnumerator,
0,
KEY_ENUMERATE_SUB_KEYS,
&hEnumeratorKey);
if (dwError != ERROR_SUCCESS)
{
DPRINT("Failed to open the enumerator key (Error %lu)\n", dwError);
return CR_REGISTRY_ERROR;
}
dwUsedLength = 0;
dwRemainingLength = *pulLength;
pPtr = pszBuffer;
for (dwIndex = 0; ; dwIndex++)
{
dwDeviceLength = MAX_DEVICE_ID_LEN;
dwError = RegEnumKeyExW(hEnumeratorKey,
dwIndex,
szDeviceBuffer,
&dwDeviceLength,
NULL,
NULL,
NULL,
NULL);
if (dwError != ERROR_SUCCESS)
break;
wsprintf(szPathBuffer, L"%s\\%s", pszEnumerator, szDeviceBuffer);
DPRINT("Path: %S\n", szPathBuffer);
dwPathLength = dwRemainingLength;
ret = GetDeviceInstanceList(szPathBuffer,
pPtr,
&dwPathLength);
if (ret != CR_SUCCESS)
break;
dwUsedLength += dwPathLength - 1;
dwRemainingLength += dwPathLength - 1;
pPtr += dwPathLength - 1;
}
RegCloseKey(hEnumeratorKey);
if (ret == CR_SUCCESS)
*pulLength = dwUsedLength + 1;
else
*pulLength = 0;
return ret;
}
/* Function 10 */
DWORD
WINAPI
@ -688,7 +759,9 @@ PNP_GetDeviceList(
}
else
{
ret = CR_CALL_NOT_IMPLEMENTED;
ret = GetEnumeratorInstanceList(pszFilter,
Buffer,
pulLength);
}
}
else /* CM_GETIDLIST_FILTER_NONE */