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From: kline@CS.Arizona.EDU (Nick Kline)
Newsgroups: comp.sys.next.programmer,comp.dcom.modems,comp.unix.bsd,comp.unix.programmer
Subject: resolved: how to exit pgm w/o hanging up phone
Followup-To: comp.sys.next.programmer
Date: 15 Jul 1993 19:10:47 -0700
Organization: University of Arizona CS Department, Tucson AZ
Lines: 46
Message-ID: <2252n7$c9p@cheltenham.cs.arizona.edu>
References: <21r411$2dj@cheltenham.cs.arizona.edu> <2252fm$c65@cheltenham.cs.arizona.edu>
NNTP-Posting-Host: cheltenham.cs.arizona.edu
The question was answered.
Here was the orginal posting:
<21r411$2dj@cheltenham.cs.arizona.edu> kline@CS.Arizona.EDU writes:
>
>
>I am wondering how my program can keep from hanging up the modem after
>it exits.
>
>I have a NeXT 040 cube running os release 3.0. I have a zyxel modem.
>For those in other newsgroups, this runs a bsd 4.3 / mach 2.x combo.
>If there is a way to do this in bsd, then it should work here.
I received several basic solutions:
1. change the modem config so that it ignores dtr (which is cleared when
you exit a pgm).
But: I wanted a modem independent way.
2. many ioctl's take a 3rd parameter which is 0 or 1 which turns that
off or on.
#define TIOCHPCL _IO('t',2) /* hang up on last close */
But: TIOCHPCL ignores that 3rd parameter (and it's not documented that way).
3. The correct solution was to open /dev/tty* such as ttyfa instead of
cufa. This works. it doesn't hangup the phone after exiting.
- thanks for the info.
He also added:
|>>However, you will have difficulty sharing with any concurrent subprocesses.
|>>--- Bruce Gingery bruce@TotSysSoft.com Total System Software -
|>>---- -- -- the makers of DFax
I don't believe I've ever read about opening /dev/ttyf* anywhere.
It works correctly.
-nick
ps
isn't the net great? probably if I had called up atari and had my credit