Am Thu, 17 May 2018 10:31:55 -0500 schrieb Roland Hughes <rol...@logikalsolutions.com>:
> On 05/17/2018 09:11 AM, alexander golks wrote: > >> my code was: > >> qint64 res = f.write(data); > > just for the curious ones: > > > > i have at least compiled 5.6.4 now, but i can not produce the error with my > > qt5core. > > using 5.6.3 from qt, error exists. using mine, does not exist... > > > > getting the error code directly after the f.write(data) gives me error code > > 183: > > ERROR_ALREADY_EXISTS > > 183 (0xB7) > > Cannot create a file when that file already exists. > > > > but i assume, that the error is not from the failing WriteFile call. or > > does it? > > anyone with some more ideas? > > e.g. on how to reproduce or test? > > One of the annoying safety features of Qt is that it won't overwrite a > file. You got that error when you tried to open the file for output and > you didn't check for the error. There was some test case long ago where > it was deemed a security risk for Qt to overwrite existing files. This > deviates from standard C/C++ where you can. Before opening an output > file you need to test for its existence then delete it. You can also > play games with opening the file for I/O and truncating, but, success is > file system dependent on that one. > the QFile::write call returns with no error, i called GetLastError() after the QFile::write() and got 183. the file is written up to ~30MB, and suddenly already exists? i am pretty sure, the file doesn't exist prior the call. -- /* *You will meet an important person who will help you advance professionally. */ _______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
