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implemented RegOpenUserClassesRoot (doesn't work in reactos because there's no symbolic link \Registry\User\<SID>_Classes yet)

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svn path=/trunk/; revision=15009
This commit is contained in:
Thomas Bluemel 2005-05-05 17:45:00 +00:00
parent bcbeeea71f
commit 6b48fc81ad
2 changed files with 147 additions and 1 deletions
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2
reactos/lib/advapi32/advapi32.def
View file

@ -492,7 +492,7 @@ RegOpenKeyA@12
RegOpenKeyExA@20
RegOpenKeyExW@20
RegOpenKeyW@12
;RegOpenUserClassesRoot
RegOpenUserClassesRoot@16
;RegOverridePredefKey
RegQueryInfoKeyA@48
RegQueryInfoKeyW@48

146
reactos/lib/advapi32/reg/reg.c
View file

@ -1719,6 +1719,152 @@ RegOpenKeyExW (HKEY hKey,
}
/************************************************************************
* RegOpenUserClassesRoot
*
* @implemented
*/
LONG STDCALL
RegOpenUserClassesRoot (IN HANDLE hToken,
IN DWORD dwOptions,
IN REGSAM samDesired,
OUT PHKEY phkResult)
{
const WCHAR UserClassesKeyPrefix[] = L"\\Registry\\User\\";
const WCHAR UserClassesKeySuffix[] = L"_Classes";
PTOKEN_USER TokenUserData;
ULONG RequiredLength;
UNICODE_STRING UserSidString, UserClassesKeyRoot;
OBJECT_ATTRIBUTES ObjectAttributes;
LONG ErrorCode;
NTSTATUS Status;
/* check parameters */
if (hToken == NULL || dwOptions != 0 || phkResult == NULL)
{
return ERROR_INVALID_PARAMETER;
}
/*
* Get the user sid from the token
*/
ReadTokenSid:
/* determine how much memory we need */
Status = NtQueryInformationToken(hToken,
TokenUser,
NULL,
0,
&RequiredLength);
if (!NT_SUCCESS(Status) && (Status != STATUS_BUFFER_TOO_SMALL))
{
/* NOTE - as opposed to all other registry functions windows does indeed
change the last error code in case the caller supplied a invalid
handle for example! */
ErrorCode = RtlNtStatusToDosError (Status);
return ErrorCode;
}
TokenUserData = RtlAllocateHeap(ProcessHeap,
0,
RequiredLength);
if (TokenUserData == NULL)
{
return ERROR_NOT_ENOUGH_MEMORY;
}
/* attempt to read the information */
Status = NtQueryInformationToken(hToken,
TokenUser,
TokenUserData,
RequiredLength,
&RequiredLength);
if (!NT_SUCCESS(Status))
{
RtlFreeHeap(ProcessHeap,
0,
TokenUserData);
if (Status == STATUS_BUFFER_TOO_SMALL)
{
/* the information appears to have changed?! try again */
goto ReadTokenSid;
}
/* NOTE - as opposed to all other registry functions windows does indeed
change the last error code in case the caller supplied a invalid
handle for example! */
ErrorCode = RtlNtStatusToDosError (Status);
return ErrorCode;
}
/*
* Build the absolute path for the user's registry in the form
* "\Registry\User\<SID>_Classes"
*/
Status = RtlConvertSidToUnicodeString(&UserSidString,
TokenUserData->User.Sid,
TRUE);
/* we don't need the user data anymore, free it */
RtlFreeHeap(ProcessHeap,
0,
TokenUserData);
if (!NT_SUCCESS(Status))
{
return RtlNtStatusToDosError (Status);
}
/* allocate enough memory for the entire key string */
UserClassesKeyRoot.Length = 0;
UserClassesKeyRoot.MaximumLength = UserSidString.Length +
sizeof(UserClassesKeyPrefix) +
sizeof(UserClassesKeySuffix);
UserClassesKeyRoot.Buffer = RtlAllocateHeap(ProcessHeap,
0,
UserClassesKeyRoot.MaximumLength);
if (UserClassesKeyRoot.Buffer == NULL)
{
RtlFreeUnicodeString(&UserSidString);
return RtlNtStatusToDosError (Status);
}
/* build the string */
RtlAppendUnicodeToString(&UserClassesKeyRoot,
UserClassesKeyPrefix);
RtlAppendUnicodeStringToString(&UserClassesKeyRoot,
&UserSidString);
RtlAppendUnicodeToString(&UserClassesKeyRoot,
UserClassesKeySuffix);
DPRINT("RegOpenUserClassesRoot: Absolute path: %wZ\n", &UserClassesKeyRoot);
/*
* Open the key
*/
InitializeObjectAttributes (&ObjectAttributes,
&UserClassesKeyRoot,
OBJ_CASE_INSENSITIVE,
NULL,
NULL);
Status = NtOpenKey((PHANDLE)phkResult,
samDesired,
&ObjectAttributes);
RtlFreeUnicodeString(&UserSidString);
RtlFreeUnicodeString(&UserClassesKeyRoot);
if (!NT_SUCCESS(Status))
{
return RtlNtStatusToDosError (Status);
}
return ERROR_SUCCESS;
}
/************************************************************************
* RegQueryInfoKeyA
*