Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!auspex!guy
From: guy@auspex.auspex.com (Guy Harris)
Newsgroups: comp.unix.questions
Subject: Re: help sought - securing a terminal/line
Message-ID: <3846@auspex.auspex.com>
Date: 7 Aug 90 18:21:30 GMT
References: <13089.26b57b8d@qut.edu.au> <3056@awdprime.UUCP>
Organization: Auspex Systems, Santa Clara
Lines: 18

>Under Unix-like OS's, you can run any program you like in place of the login
>by modifying the /etc/inittab file.  Under Xenix there is a somewhat obscure
>thing you can do in /etc/gettydefs to cause a program besides getty to run.
>
>Someone else posted something about /etc/ttys.  I think the above info is
>correct.

The above info is correct for UNIX-like systems that have "/etc/inittab"
files (assuming "the login" actually refers to "getty", which is
normally what is run out of "/etc/inittab" for most ports).

For UNIX-like systems with 4.3BSD-style "/etc/ttys" files (even if
called "/etc/ttytab", as was done in SunOS for binary-compatibility
reasons), the info posted about "/etc/ttys" is correct. 

For UNIX-like systems with "ttymon", such as System V Release 4, I think
there's some other magic you can do to arrange that "ttymon" run your
program when the port starts up.