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From: dave@murphy.UUCP (Dave Cornutt)
Newsgroups: comp.unix.wizards
Subject: Re: Absolutly hanging up a modem
Message-ID: <688@murphy.UUCP>
Date: Mon, 2-Nov-87 17:09:17 EST
Article-I.D.: murphy.688
Posted: Mon Nov  2 17:09:17 1987
Date-Received: Fri, 6-Nov-87 22:16:09 EST
References: <1548@bloom-beacon.MIT.EDU> <142700004@tiger.UUCP> <292@minya.UUCP> <4947@ncoast.UUCP>
Organization: Gould CSD, Fort Lauderdale, FL
Lines: 30
Summary: an ioctl specific to BSD

In article <4947@ncoast.UUCP>, allbery@ncoast.UUCP (Brandon Allbery) writes:
> Less portable versions follow:
> 
> V7/BSD/Xenix 2.x:
> 	#include <sgtty.h>
> 
> 	hupfd(fd) {
> 		struct sgttyb b;
> 		
> 		if (ioctl(fd, TIOCGETP, &b) == -1)
> 			return -1;
> 		b.sg_ispeed = b.sg_ospeed = B0;
> 		return ioctl(fd, TIOCSETP, &b);
> 	}

Also, in BSD there's an ioctl, TIOCCDTR, that allegedly drops DTR without
you having to close the fd (also TIOCSDTR, which raises it).  I haven't
tried these; I just saw them in the manual.

---
"I dare you to play this record" -- Ebn-Ozn

Dave Cornutt, Gould Computer Systems, Ft. Lauderdale, FL
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