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From: jtkohl@MIT.EDU (John T Kohl)
Newsgroups: comp.sys.dec,comp.sys.ultrix
Subject: Re: How to dial out from DS3100
Message-ID: <JTKOHL.90Mar29093929@lycus.MIT.EDU>
Date: 29 Mar 90 14:39:28 GMT
References: <1079@psych.stanford.edu>
Sender: news@athena.mit.edu (News system)
Distribution: usa
Organization: MIT Project Athena
Lines: 95
In-Reply-To: connie@psych.Stanford.EDU's message of 29 Mar 90 01:15:24 GMT

In article <1079@psych.stanford.edu> connie@psych.Stanford.EDU (Constance Stillinger) writes:

>     >>>> I just don't have the faintest idea how to configure things
>     to enable dial-INS, however.  Anyone who has been able to do this,
>     pleeeeze email me! <<<<

I have a modem (Telebit Trailblazer +) set up for dial in/out on my
machine.  For dial-out, I use kermit, with some mods I added to do the
line sharing properly (attached are patches to ckutio.c, from C-Kermit,
4D(061) 8 Sep 86).  Just do 

	set line /dev/ttyd0
	set baud xxxx
	connect
and dial away.

For dial-in, I modified /etc/gettytab to make an appropriate baud-rate loop
for autobauding incoming connections, but it sometimes doesn't work
quite right.  I usually dial in at 9600bps, so it's usually not a
problem.
>>> WARNING:  make sure your modem is silent (non-echoing, no ring
indication, etc), otherwise the getty process and the modem will have a
nice long chat, eating up CPU time.

My /etc/ttys line for the dialin/out is this:
ttyd0   "/etc/getty D9600" network      on shared secure # modem line

(D9600 is my new entry in /etc/gettytab)

and the kermit patches (again, relative to C-Kermit 4D(061) 8 Sep 86)
*** /tmp/,RCSt1000726	Thu Mar 29 09:36:50 1990
--- ckutio.c	Wed Sep 20 15:42:53 1989
***************
*** 377,389 ****
  #ifdef NEWUUCP
      acucntrl("disable",ttname);		/* Open getty on line (4.3BSD) */
  #endif
! #ifdef UXIII
      /* if modem connection, don't wait for carrier */
      ttyfd = open(ttname,O_RDWR | (modem ? O_NDELAY : 0) );
  #else
      ttyfd = open(ttname,2);		/* Try to open for read/write */
  #endif
! 
      if (ttyfd < 0) {			/* If couldn't open, fail. */
  	perror(ttname);
  	return(-1);
--- 377,393 ----
  #ifdef NEWUUCP
      acucntrl("disable",ttname);		/* Open getty on line (4.3BSD) */
  #endif
! #ifdef ultrix
      /* if modem connection, don't wait for carrier */
+     ttyfd = open(ttname,O_RDWR | O_BLKINUSE, 0 );
+ #else
+ #ifdef O_NDELAY
+     /* if modem connection, don't wait for carrier */
      ttyfd = open(ttname,O_RDWR | (modem ? O_NDELAY : 0) );
  #else
      ttyfd = open(ttname,2);		/* Try to open for read/write */
  #endif
! #endif /* ultrix */
      if (ttyfd < 0) {			/* If couldn't open, fail. */
  	perror(ttname);
  	return(-1);
***************
*** 452,457 ****
--- 456,465 ----
  
  /* Request exclusive access on systems that allow it. */
  
+ #ifdef ultrix
+     if (ioctl(ttyfd, TIOCSINUSE, 0) < 0)
+ 	fprintf(stderr,"Warning, problem getting inuse access\n");
+ #endif
  #ifndef XENIX
  /* Xenix exclusive access prevents open(close(...)) from working... */
  #ifdef TIOCEXCL
***************
*** 489,494 ****
--- 497,506 ----
      }
      ttres();				/* Reset modes. */
  /* Relinquish exclusive access if we might have had it... */
+ #ifdef ultrix
+     if (ioctl(ttyfd, TIOCCINUSE, 0) < 0)
+     	fprintf(stderr,"Warning, problem relinquishing inuse access\n");
+ #endif
  #ifndef XENIX
  #ifdef TIOCEXCL
  #ifdef TIOCNXCL
--
John Kohl <jtkohl@ATHENA.MIT.EDU> or <jtkohl@Kolvir.Brookline.MA.US>
Digital Equipment Corporation/Project Athena
(The above opinions are MINE.  Don't put my words in somebody else's mouth!)