How ignore file creation after calling CreateFile() Win32 API

drjackool 956

Hi
How cancel file creating after calling CreateFile() and before CloseHandle? is there a way or have to use CloseHandle() then DeleteFile()?
Can I use CancelIo() ?
Thanks

David Lowndes 4,711 Reputation points

2021-09-07T16:55:50.6+00:00

You'd have to delete it if it's been created.
Seems an odd situation to be in, what's behind this question?

drjackool 956

I have code like this:

hFile = CreateFile()
if (hFile != invalid_handle...)
{
     if (SetFilePointer(hFile, ...) == FALSE)
     {
            // here I want cancel the file if SetFilePointer() Fails!!!
     }

      if (SetEndOfFile(hFile, ...) == FALSE)
      {
       // also here
      }

      CloseHandle(hFile);
}

David Lowndes 4,711 Reputation points

2021-09-07T17:08:58.27+00:00

And by "cancel", you mean "delete"?
I believe you can just call DeleteFile - though there's the (unlikely) situation that you may have permissions to create a file, but not delete it.

Accepted answer

RLWA32 40,756 Reputation points

2021-09-07T17:27:28.087+00:00
Try this -

#define WIN32_LEAN_AND_MEAN #include <Windows.h> int main() { DWORD dwDesiredAccess = GENERIC_ALL; // or ask for DELETE with other desired permissions HANDLE hFile = CreateFile(TEXT("Badfile.txt"), dwDesiredAccess, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL); if (hFile != INVALID_HANDLE_VALUE) { // Oops! Something bad happened FILE_DISPOSITION_INFO fdi = { static_cast<BOOLEAN>(TRUE) }; SetFileInformationByHandle(hFile, FileDispositionInfo, &fdi, sizeof fdi); CloseHandle(hFile); } return 0; }
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RLWA32 40,756 Reputation points

2021-09-08T18:36:58.76+00:00

Did you check the API functions for success/failure? What error codes were returned by GetLastError() if SetFileInformationByHandle or CloseHandle failed?

Did you ask for GENERIC_ALL or DELETE permission?

It worked just fine for me when I tested the code on Win 10.

RLWA32 40,756 Reputation points

2021-09-08T18:37:55.313+00:00

Did you check the API functions for success/failure? What error codes were returned by GetLastError() if SetFileInformationByHandle or CloseHandle failed?

Did you ask for GENERIC_ALL or DELETE permission?

It worked just fine for me when I tested the code on Win 10.

drjackool 956 Reputation points

2021-09-09T03:21:26.647+00:00

I set to GENERIC_ALL and it works. Thanks.
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1 additional answer

Viorel 112.5K Reputation points

2021-09-07T16:57:13.303+00:00

If you always want to delete this file, then consider CreateFile with FILE_FLAG_DELETE_ON_CLOSE flag.
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