C / C++ / MFC

bool sysAccessWrite(const LPWSTR path)
{
	DWORD result;
	SECURITY_INFORMATION secInfo = DACL_SECURITY_INFORMATION;
	PSECURITY_DESCRIPTOR secDesc;
	PACL dacl;
	TRUSTEE trustee;
	ACCESS_MASK rights;

	// Get the discretionary access control list.
	result = GetNamedSecurityInfo( path, SE_FILE_OBJECT, secInfo,
		NULL, NULL, &dacl, NULL, &secDesc );
	if( result != ERROR_SUCCESS )
	{
		// set errno = an appropriate error code
		return false;
	}

	// Determine the current user's access rights.
	trustee.pMultipleTrustee = NULL;
	trustee.MultipleTrusteeOperation = NO_MULTIPLE_TRUSTEE;
	trustee.TrusteeForm = TRUSTEE_IS_NAME;
	trustee.TrusteeType = TRUSTEE_IS_USER;
	trustee.ptstrName = _T("CURRENT_USER");
	result = GetEffectiveRightsFromAcl(dacl, &trustee, &rights);
	if( result != ERROR_SUCCESS )
	{
		// set errno = an appropriate error code
		return false;
	}

	// Free the security descriptor.
	(void) LocalFree(secDesc);

	// Return the result.
	return (rights & GENERIC_WRITE) ? true : false;
}

staffan_v wrote:

I do not want to write files. I want to know if I can write files. i.e. I have a file name and want to be able to answer the question "Can I write to this file?".

staffan_v wrote:

I would not know exactly why it failed...

staffan_v wrote:

Did you answer to the right message?

staffan_v wrote:

Your reply seem to have nothing to do with what I asked about.