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- Fix obvious bugs in the code (e.g. freeing a stack-allocated pointer).

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- Rewrite the code to be more readable.
- Enlarge static buffer for SearchPathBuffer to be at least 5*MAX_PATH to prevent possible overflowing for now. In the meanwhile, Dmitry is rewriting this part of code to dynamically allocate the memory without the need for a temporary static storage.

svn path=/trunk/; revision=40936
This commit is contained in:
Aleksey Bragin 2009-05-16 08:41:26 +00:00
parent 3c69a5f48e
commit 18c654d60a
1 changed files with 42 additions and 42 deletions
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84
reactos/dll/ntdll/ldr/utils.c
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@ -185,19 +185,21 @@ LdrpQueryAppPaths(IN PCWSTR ImageName)
{
PKEY_VALUE_PARTIAL_INFORMATION KeyInfo;
OBJECT_ATTRIBUTES ObjectAttributes;
WCHAR SearchPathBuffer[MAX_PATH];
WCHAR SearchPathBuffer[5*MAX_PATH];
UNICODE_STRING ValueNameString;
UNICODE_STRING KeyName;
WCHAR NameBuffer[256];
WCHAR NameBuffer[MAX_PATH];
ULONG KeyInfoSize;
ULONG ResultSize;
ULONG len;
PWCHAR Backslash;
HANDLE KeyHandle;
NTSTATUS Status;
PWSTR Path = NULL;
swprintf(NameBuffer,
L"\\Registry\\Machine\\Software\\Microsoft\\Windows\\CurrentVersion\\App Paths\\%s", ImageName);
_snwprintf(NameBuffer,
sizeof(NameBuffer) / sizeof(WCHAR),
L"\\Registry\\Machine\\Software\\Microsoft\\Windows\\CurrentVersion\\App Paths\\%s",
ImageName);
RtlInitUnicodeString(&KeyName, NameBuffer);
@ -236,49 +238,47 @@ LdrpQueryAppPaths(IN PCWSTR ImageName)
KeyInfoSize,
&ResultSize);
if (NT_SUCCESS(Status))
{
RtlCopyMemory(SearchPathBuffer,
&KeyInfo->Data,
KeyInfo->DataLength);
if (!NT_SUCCESS(Status))
return NULL;
/* get application running path */
wcscat(SearchPathBuffer, L";");
wcscat (SearchPathBuffer, NtCurrentPeb()->ProcessParameters->ImagePathName.Buffer);
len = wcslen (SearchPathBuffer);
while (len && SearchPathBuffer[len - 1] != L'\\')
len--;
if (len) SearchPathBuffer[len-1] = L'\0';
wcscat (SearchPathBuffer, L";");
wcscat (SearchPathBuffer, SharedUserData->NtSystemRoot);
wcscat (SearchPathBuffer, L"\\system32;");
wcscat (SearchPathBuffer, SharedUserData->NtSystemRoot);
wcscat (SearchPathBuffer, L";.");
Path = RtlAllocateHeap(RtlGetProcessHeap(),
0,
wcslen(SearchPathBuffer) * sizeof(WCHAR));
if (Path == NULL)
{
DPRINT("RtlAllocateHeap() failed\n");
RtlFreeHeap(RtlGetProcessHeap(), 0, KeyInfo);
NtClose(KeyHandle);
return NULL;
}
Path = SearchPathBuffer;
}
RtlCopyMemory(SearchPathBuffer,
&KeyInfo->Data,
KeyInfo->DataLength);
/* Free KeyInfo memory, we won't need it anymore */
RtlFreeHeap(RtlGetProcessHeap(), 0, KeyInfo);
/* Close the key handle */
NtClose(KeyHandle);
/* get application running path */
wcscat(SearchPathBuffer, L";");
wcscat(SearchPathBuffer, NtCurrentPeb()->ProcessParameters->ImagePathName.Buffer); // FIXME: Don't rely on it being NULL-terminated!!!
/* Remove trailing backslash */
Backslash = wcsrchr(SearchPathBuffer, L'\\');
if (Backslash) Backslash = L'\0';
wcscat(SearchPathBuffer, L";");
wcscat(SearchPathBuffer, SharedUserData->NtSystemRoot);
wcscat(SearchPathBuffer, L"\\system32;");
wcscat(SearchPathBuffer, SharedUserData->NtSystemRoot);
wcscat(SearchPathBuffer, L";.");
/* Copy it to the heap allocd memory */
Path = RtlAllocateHeap(RtlGetProcessHeap(),
0,
wcslen(SearchPathBuffer) * sizeof(WCHAR));
if (!Path)
{
DPRINT1("RtlAllocateHeap() failed\n");
return NULL;
}
wcscpy(Path, SearchPathBuffer);
return Path;
}