----- Original Message ----- | From: "Åke Rehnman" <ake.rehn...@gmail.com> | To: "cygwin" <cygwin@cygwin.com> | Sent: Wednesday, March 11, 2020 4:48:05 PM | Subject: Setting termios VMIN > 0 and VTIME > 0 on non blocking file
| Hello all, | | opening a file (serial port) with O_NONBLOCK and subsequently setting | termios VMIN and VTIME > 0 makes read() never ever return any data | (returns EAGAIN indefinitely). | | Don't ask my why one would want to do something like this but apparently | the "screen" program think this is a good way of doing things... | | Nevertheless not returning any data ever seems wrong. | | Any insight on how it is supposed to work is welcome. If not "correct", it's certainly inconsistent with all other systems. I noticed it recently: https://invisible-island.net/ncurses/tack/CHANGES.html#t20200220 https://github.com/cygwinports/tack/issues/1 It's either recently-broken, or just coincidence :-) -- Thomas E. Dickey <dic...@invisible-island.net> http://invisible-island.net ftp://ftp.invisible-island.net -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
