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[KERNEL32] Check NtQueryInformationFile succeed before using its return. Also fix coding style

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CID 512966
This commit is contained in:
Pierre Schweitzer 2017-10-23 12:36:43 +02:00
parent 361664d57f
commit 19f1cd78c1
1 changed files with 77 additions and 57 deletions
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80
dll/win32/kernel32/client/file/fileinfo.c
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@ -329,65 +329,85 @@ SetFilePointerEx(HANDLE hFile,
PLARGE_INTEGER lpNewFilePointer, PLARGE_INTEGER lpNewFilePointer,
DWORD dwMoveMethod) DWORD dwMoveMethod)
{ {
NTSTATUS Status;
IO_STATUS_BLOCK IoStatusBlock;
FILE_POSITION_INFORMATION FilePosition; FILE_POSITION_INFORMATION FilePosition;
FILE_STANDARD_INFORMATION FileStandard; FILE_STANDARD_INFORMATION FileStandard;
NTSTATUS errCode;
IO_STATUS_BLOCK IoStatusBlock;
if(IsConsoleHandle(hFile)) if (IsConsoleHandle(hFile))
{ {
SetLastError(ERROR_INVALID_HANDLE); BaseSetLastNTError(STATUS_INVALID_HANDLE);
return FALSE; return FALSE;
} }
switch(dwMoveMethod) switch (dwMoveMethod)
{ {
case FILE_CURRENT: case FILE_CURRENT:
NtQueryInformationFile(hFile, {
&IoStatusBlock, Status = NtQueryInformationFile(hFile, &IoStatusBlock,
&FilePosition, &FilePosition,
sizeof(FILE_POSITION_INFORMATION), sizeof(FILE_POSITION_INFORMATION),
FilePositionInformation); FilePositionInformation);
FilePosition.CurrentByteOffset.QuadPart += liDistanceToMove.QuadPart; if (!NT_SUCCESS(Status))
break; {
case FILE_END: BaseSetLastNTError(Status);
NtQueryInformationFile(hFile,
&IoStatusBlock,
&FileStandard,
sizeof(FILE_STANDARD_INFORMATION),
FileStandardInformation);
FilePosition.CurrentByteOffset.QuadPart =
FileStandard.EndOfFile.QuadPart + liDistanceToMove.QuadPart;
break;
case FILE_BEGIN:
FilePosition.CurrentByteOffset.QuadPart = liDistanceToMove.QuadPart;
break;
default:
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE; return FALSE;
} }
if(FilePosition.CurrentByteOffset.QuadPart < 0) FilePosition.CurrentByteOffset.QuadPart += liDistanceToMove.QuadPart;
break;
}
case FILE_END:
{
Status = NtQueryInformationFile(hFile, &IoStatusBlock,
&FileStandard,
sizeof(FILE_STANDARD_INFORMATION),
FileStandardInformation);
if (!NT_SUCCESS(Status))
{
BaseSetLastNTError(Status);
return FALSE;
}
FilePosition.CurrentByteOffset.QuadPart = FileStandard.EndOfFile.QuadPart +
liDistanceToMove.QuadPart;
break;
}
case FILE_BEGIN:
{
FilePosition.CurrentByteOffset.QuadPart = liDistanceToMove.QuadPart;
break;
}
default:
{
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
}
if (FilePosition.CurrentByteOffset.QuadPart < 0)
{ {
SetLastError(ERROR_NEGATIVE_SEEK); SetLastError(ERROR_NEGATIVE_SEEK);
return FALSE; return FALSE;
} }
errCode = NtSetInformationFile(hFile, Status = NtSetInformationFile(hFile, &IoStatusBlock, &FilePosition,
&IoStatusBlock,
&FilePosition,
sizeof(FILE_POSITION_INFORMATION), sizeof(FILE_POSITION_INFORMATION),
FilePositionInformation); FilePositionInformation);
if (!NT_SUCCESS(errCode)) if (!NT_SUCCESS(Status))
{ {
BaseSetLastNTError(errCode); BaseSetLastNTError(Status);
return FALSE; return FALSE;
} }
if (lpNewFilePointer) if (lpNewFilePointer != NULL)
{ {
*lpNewFilePointer = FilePosition.CurrentByteOffset; *lpNewFilePointer = FilePosition.CurrentByteOffset;
} }
return TRUE; return TRUE;
} }