> > oh, i found the 'cat /dev/ttyS1' really outputs, but it has a very > *big* delay that leads me thought it does not response. is the > output buffered? what do i do? thanks!
Yes, cat with no options calls read(), which typically uses buffers. Try cat -u to get unbuffered output. Or there are other programs, such as dd, which are better suited with options to tweak to get unbuffered output. -- Eric Blake volunteer cygwin coreutils maintainer -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
