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[MSPORTS] When the LPT port number gets changed, update the PortName and FriendlyName values in the registry.

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This commit is contained in:
Eric Kohl 2018-10-06 11:11:07 +02:00
parent 52ccfcf6fe
commit c603c54ab0
1 changed files with 92 additions and 2 deletions
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94
dll/win32/msports/parallel.c
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@ -159,6 +159,89 @@ ReadPortSettings(
}
static
DWORD
ChangePortNumber(
_In_ PPORT_DATA pPortData,
_In_ DWORD dwNewPortNumber)
{
WCHAR szDeviceDescription[256];
WCHAR szFriendlyName[256];
WCHAR szNewPortName[16];
HKEY hDeviceKey = INVALID_HANDLE_VALUE;
DWORD dwError;
/* We are done if old and new port number are the same */
if (pPortData->dwPortNumber == dwNewPortNumber)
return ERROR_SUCCESS;
/* Build the new port name */
swprintf(szNewPortName, L"LPT%lu", dwNewPortNumber);
/* Open the devices hardware key */
hDeviceKey = SetupDiOpenDevRegKey(pPortData->DeviceInfoSet,
pPortData->DeviceInfoData,
DICS_FLAG_GLOBAL,
0,
DIREG_DEV,
KEY_READ | KEY_WRITE);
if (hDeviceKey == INVALID_HANDLE_VALUE)
{
return GetLastError();
}
/* Set the new 'PortName' value */
dwError = RegSetValueExW(hDeviceKey,
L"PortName",
0,
REG_SZ,
(LPBYTE)szNewPortName,
(wcslen(szNewPortName) + 1) * sizeof(WCHAR));
if (dwError != ERROR_SUCCESS)
goto done;
/* Save the new port name and number */
wcscpy(pPortData->szPortName, szNewPortName);
pPortData->dwPortNumber = dwNewPortNumber;
/* Get the device description... */
if (SetupDiGetDeviceRegistryProperty(pPortData->DeviceInfoSet,
pPortData->DeviceInfoData,
SPDRP_DEVICEDESC,
NULL,
(PBYTE)szDeviceDescription,
sizeof(szDeviceDescription),
NULL))
{
/* ... and use it to build a new friendly name */
swprintf(szFriendlyName,
L"%s (%s)",
szDeviceDescription,
szNewPortName);
}
else
{
/* ... or build a generic friendly name */
swprintf(szFriendlyName,
L"Parallel Port (%s)",
szNewPortName);
}
/* Set the friendly name for the device */
SetupDiSetDeviceRegistryProperty(pPortData->DeviceInfoSet,
pPortData->DeviceInfoData,
SPDRP_FRIENDLYNAME,
(PBYTE)szFriendlyName,
(wcslen(szFriendlyName) + 1) * sizeof(WCHAR));
done:
if (hDeviceKey != INVALID_HANDLE_VALUE)
RegCloseKey(hDeviceKey);
return dwError;
}
static
VOID
WritePortSettings(
@ -169,6 +252,7 @@ WritePortSettings(
DWORD dwFilterResourceMethod;
DWORD dwLegacy;
DWORD dwPortNumber;
DWORD dwPortMap;
HKEY hKey;
DWORD dwError;
@ -248,10 +332,16 @@ WritePortSettings(
dwPortNumber++;
if (dwPortNumber != pPortData->dwPortNumber)
{
FIXME("Port name changed! LPT%lu --> LPT%lu", pPortData->dwPortNumber, dwPortNumber);
GetUsedPorts(&dwPortMap);
if (dwPortMap & 1 << dwPortNumber)
{
ERR("Port LPT%lu is already in use!\n", dwPortNumber);
return;
}
// pPortData->dwPortNumber = dwPortNumber;
ChangePortNumber(pPortData,
dwPortNumber);
}
}
}