[issue35310] select which was interrupted by EINTR isn't re-run if the timeout has passed
New submission from Brian Maissy : If a call to select.select() was interrupted by a signal and the select syscall set an errno of EINTR, then under PEP 475 the select call should be re-executed. If, however, there is a signal handler which takes enough time that the select's timeout expires, select() is not retried, and the rlist is returned as-is (with fds in it which are not ready for reading). Under this condition, either select() should be re-run with a timeout of 0, or the fd lists should be emptied before returning. Example code which reproduces the problem attached. -- files: select_eintr.py messages: 330388 nosy: Brian Maissy priority: normal severity: normal status: open title: select which was interrupted by EINTR isn't re-run if the timeout has passed type: behavior versions: Python 3.5, Python 3.6, Python 3.7, Python 3.8 Added file: https://bugs.python.org/file47945/select_eintr.py ___ Python tracker <https://bugs.python.org/issue35310> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue35310] select which was interrupted by EINTR isn't re-run if the timeout has passed
Brian Maissy added the comment: I believe the offending line in the source is this break statement: https://github.com/python/cpython/blob/master/Modules/selectmodule.c#L339 -- ___ Python tracker <https://bugs.python.org/issue35310> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue35310] select which was interrupted by EINTR isn't re-run if the timeout has passed
Brian Maissy added the comment: The current behavior is: > select() is not retried, and the rlist is returned as-is (with fds in it > which are not ready for reading) Yes, this is a bug. It results in select() indicating that fd are ready for reading when they, in fact, are not. -- ___ Python tracker <https://bugs.python.org/issue35310> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue35310] select which was interrupted by EINTR isn't re-run if the timeout has passed
Change by Brian Maissy : -- nosy: +oranav ___ Python tracker <https://bugs.python.org/issue35310> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
