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[KERNEL32] Implement DosPathToSessionPath functions #8436

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[KERNEL32] Implement DosPathToSessionPath functions #8436

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f0ecdd9
Implement DosPathToSessionPath functions
CNMrSunshine Oct 26, 2025
69a26e0
Refactor session path handling for NULL checks
CNMrSunshine Oct 26, 2025
2cd1677
Fixed coding style issue
CNMrSunshine Oct 27, 2025
08d7dfd
Update header per coding style doc
binarymaster Oct 27, 2025
a6f9f83
Fixed bug
CNMrSunshine Oct 29, 2025
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124 changes: 114 additions & 10 deletions dll/win32/kernel32/client/session.c
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Original file line number Diff line number Diff line change
@@ -1,9 +1,9 @@
/*
* PROJECT: ReactOS Win32 Base API
* LICENSE: GPL - See COPYING in the top level directory
* FILE: dll/win32/kernel32/client/session.c
* PURPOSE: Session Support APIs
* PROGRAMMERS: Alex Ionescu ([email protected])
* PROJECT: ReactOS Win32 Base API
* LICENSE: GPL-2.0-or-later (https://spdx.org/licenses/GPL-2.0-or-later)
* PURPOSE: Session Support APIs
* COPYRIGHT: Copyright 2011 Alex Ionescu <[email protected]>
* Copyright 2025 Jiayu Ge <[email protected]>
*/

/* INCLUDES *******************************************************************/
Expand All @@ -16,28 +16,132 @@
/* FUNCTIONS ******************************************************************/

/*
* @unimplemented
* @implemented
*/
DWORD
WINAPI
DosPathToSessionPathW(IN DWORD SessionID,
IN LPWSTR InPath,
OUT LPWSTR *OutPath)
{
UNIMPLEMENTED;
DWORD LastError = ERROR_SUCCESS;
if (InPath == NULL)
{
LastError = ERROR_INVALID_PARAMETER;
}
else
{
size_t InPathLength = wcslen(InPath);
size_t OutPathLength = 0;
LPWSTR SessionPath = NULL;
if (!BaseStaticServerData->LUIDDeviceMapsEnabled)
{
if (SessionID == 0)
{
OutPathLength += wcslen(L"GLOBALROOT\\DosDevices\\");
OutPathLength += InPathLength;
}
else
{
OutPathLength += wcslen(L"GLOBALROOT\\Sessions\\");
OutPathLength += 10; // Length of SessionID(char)
OutPathLength += wcslen(L"\\DosDevices\\");
OutPathLength += InPathLength;
}
}
else
{
OutPathLength += InPathLength;
}
OutPathLength += 1; // \0 termination
SessionPath = (LPWSTR)LocalAlloc(LMEM_FIXED, OutPathLength * sizeof(WCHAR));
if (SessionPath)
{
if (BaseStaticServerData->LUIDDeviceMapsEnabled)
{
RtlStringCchPrintfW(SessionPath, OutPathLength, L"%ws", InPath);
}
else if (SessionID == 0)
{
// GLOBALROOT\DosDevices\$InPath
RtlStringCchPrintfW(SessionPath, OutPathLength, L"GLOBALROOT\\DosDevices\\%ws", InPath);
}
else
{
// GLOBALROOT\Sessions\$SessionID\DosDevices\$InPath
RtlStringCchPrintfW(SessionPath, OutPathLength, L"GLOBALROOT\\Sessions\\%u\\DosDevices\\%ws", SessionID, InPath);
}
*OutPath = SessionPath;
return 1;
}
else
{
LastError = ERROR_NOT_ENOUGH_MEMORY;
}
}
RtlSetLastWin32Error(LastError);
return 0;
}

/*
* @unimplemented
* @implemented
*/
DWORD
WINAPI
DosPathToSessionPathA(IN DWORD SessionId,
DosPathToSessionPathA(IN DWORD SessionID,
IN LPSTR InPath,
OUT LPSTR *OutPath)
{
UNIMPLEMENTED;
DWORD LastError = ERROR_SUCCESS;
if (InPath == NULL)
{
LastError = ERROR_INVALID_PARAMETER;
}
else
{ // AnsiPath: InPath(ANSI) -> UnicodePath: InPath(Unicode) -> wcOutPath: OutPath(wide-char) -> UnicodePath: OutPath(Unicode) -> AnsiPath: OutPath(ANSI)
STRING AnsiPath = { 0 };
RtlInitAnsiString(&AnsiPath, InPath);
UNICODE_STRING UnicodePath;
NTSTATUS status = RtlAnsiStringToUnicodeString(&UnicodePath, &AnsiPath, TRUE); // UnicodePath = InPath(Unicode)
if (!NT_SUCCESS(status))
{
BaseSetLastNTError(status);
return 0;
}
LPWSTR wcOutPath = NULL; // OutPath(wide-char)
if (!DosPathToSessionPathW(SessionID, UnicodePath.Buffer, &wcOutPath))
{
RtlFreeUnicodeString(&UnicodePath);
return 0;
}
RtlFreeUnicodeString(&UnicodePath);
RtlInitUnicodeString(&UnicodePath, wcOutPath); // UnicodePath = OutPath(Unicode)
status = RtlUnicodeStringToAnsiString(&AnsiPath, &UnicodePath, TRUE);
if (!NT_SUCCESS(status))
{
BaseSetLastNTError(status);
LocalFree(wcOutPath);
return 0;
}
size_t AnsiOutPathLen = strlen(AnsiPath.Buffer);
AnsiOutPathLen += 1;
char *SessionPath = LocalAlloc(LMEM_FIXED, AnsiOutPathLen * sizeof(CHAR));
if (SessionPath != NULL)
{
RtlStringCchCopyA(SessionPath, AnsiOutPathLen, AnsiPath.Buffer);
*OutPath = SessionPath;
LocalFree(wcOutPath);
RtlFreeAnsiString(&AnsiPath);
return 1;
}
else
{
LocalFree(wcOutPath);
RtlFreeAnsiString(&AnsiPath);
LastError = ERROR_NOT_ENOUGH_MEMORY;
}
}
RtlSetLastWin32Error(LastError);
return 0;
}

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