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Newsgroups: comp.os.386bsd.development Path: sserve!newshost.anu.edu.au!munnari.oz.au!news.Hawaii.Edu!ames!pacbell.com!ihnp4.ucsd.edu!usc!howland.reston.ans.net!torn!mcshub!cebnet!mike From: mike@CEB.McMaster.CA (Mike Anderson) Subject: Re: vi (elvis) and more dont work on com ports Message-ID: <1994Mar14.210412.9603@mcshub.dcss.mcmaster.ca> Sender: usenet@mcshub.dcss.mcmaster.ca Nntp-Posting-Host: cebnet.ceb.mcmaster.ca Organization: McMaster University, Hamilton, Ontario, Canada References: <2ljo9e$2qv@news.iastate.edu> <1994Mar9.081306.505@news.csuohio.edu> <2lmdps$347@nwfocus.wa.com> Date: Mon, 14 Mar 1994 21:04:12 GMT Lines: 30 I traced the problem (with elvis and more over tty serial port) to specific ioctl calls. I then wrote a simple program that also exhibits the bug. Here is a fragment: struct sgttyb tty; ioctl(1, TIOCGETP, &tty); ioctl(1, TIOCSETP, &tty); after the second ioctl ( the set) the tty device gets messed up. It seems that a get followed by a set should not mess up the tty device. (This program doen't mess up on the PCs VGA console) I noticed in the kernal code that these ioctls are in a compatibility module and are being translated into another set set of ioctls. I suspect this is where problem lies. Thanks for the suggestions about stty cs8 -parenb and so forth. I have tried the like and will fiddle some more but I think there is a real bug here. Can anyone report to me that they are actually using a terminal on the serial ports and using vi(elvis) or more ? If so what is your configuration(mine is in brackets) OS: (NetBSD 0.9) serial port: (com1 (which is the PCs com2)) terminal: (Tek4115 (termcap: 4115)) mike