New submission from Alexey Izbyshev <izbys...@ispras.ru>: os.dup2(fd, fd, inheritable=False) may fail or change fd inheritability in following ways:
1) POSIX without F_DUP2FD_CLOEXEC 1.1) dup3() is available (a common case for Linux): OSError (EINVAL, dup3() doesn't allow equal descriptors) 1.2) dup3() is not available: fd made non-inheritable 2) POSIX with F_DUP2FD_CLOEXEC (FreeBSD): inheritability is not changed 3) Windows: fd made non-inheritable In contrast, os.dup2(fd, fd, inheritable=True) never changes fd inheritability (same as before PEP 446 landed). I suggest to make os.dup2(fd, fd, inheritable=False) behave the same. ---------- components: Extension Modules, Library (Lib) messages: 312266 nosy: benjamin.peterson, izbyshev, vstinner priority: normal severity: normal status: open title: os.dup2(fd, fd, inheritable=False) behaves inconsistently type: behavior versions: Python 3.6, Python 3.7 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue32862> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
