stupid modem init question

• Messages sorted by:[ date ][ thread ][ subject ][ author ]

Hi,

On Fri, Nov 13, 1998 at 03:49:02PM +0530, Prasad Khandkar wrote:
> Somewhat unrelated with mgetty, but  related with serial i/o is a question  i
> have, as far as SCO OpenServer is concerned, is that is there any serial driver
> support for detecting if the "carrier" has been "dropped" or not.

It is, but only by sending SIGHUP to the involved processes.  You can't
query the standard serial driver.

> Like Gert said, if dropping the DTR messes up a serial port on SCO, what else
> is there to forcefully terminate a data connection when the +++ATH fails to
> get the attention of the modem ?

If you close the modem port, DTR will drop anyway.  So after a second
mgetty restart, DTR *will* have dropped.

(The best way, of course, is to install the FAS serial driver with my
TIOCM* ioctl() patches that allows fiddling with all the serial lines
directly - see ftp.leo.org:/pub/comp/os/unix/mgetty/).

gert
-- 
USENET is *not* the non-clickable part of WWW!
                                                           //www.muc.de/~gert/
Gert Doering - Munich, Germany                             gert@greenie.muc.de
fax: +49-89-35655025                        gert.doering@physik.tu-muenchen.de