New submission from Eryk Sun: WindowsConsoleIO fileno() gets a file descriptor on demand by calling _open_osfhandle. As a low I/O function this expects _open flags, but currently the code is passing 'rb' (int 0x7262) and 'wb' (int 0x7762). It should use _O_RDONLY | _O_BINARY and _O_WRONLY | _O_BINARY.
Actually, _open_osfhandle isn't actually opening the file, so it only cares about a few flags. Specifically, in lowio\osfinfo.cpp I see that it looks for _O_APPEND, _O_TEXT, and _O_NOINHERIT. So in this case passing 0 for the flags would also be ok. ---------- components: IO, Library (Lib), Windows messages: 276509 nosy: eryksun, paul.moore, steve.dower, tim.golden, zach.ware priority: normal severity: normal stage: needs patch status: open title: WindowsConsoleIO fileno() passes wrong flags to _open_osfhandle type: behavior versions: Python 3.6, Python 3.7 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue28163> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
