Thanks for sending that code, and explanation. By playing around with things, and reading around, I found that --- as you had suggested --- there was a way to do this from a command line. I was already using stty to set the baud rate for the tty, but it seems I can also get this effect by adding [-]icanon to the call. I have added this call just before and after I need to read the incomplete line, as an off/on switch, and am getting things working as I would hope. -- Matthew -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/