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From: brnstnd@stealth.acf.nyu.edu
Newsgroups: comp.unix.ultrix
Subject: Re: How to do a login shell right on Ultrix
Message-ID: <1036:Apr1222:38:4590@stealth.acf.nyu.edu>
Date: 12 Apr 90 22:38:45 GMT
References: <127@minya.UUCP>
Reply-To: brnstnd@stealth.acf.nyu.edu (Dan Bernstein)
Distribution: usa
Organization: IR
Lines: 15

In article <127@minya.UUCP> jc@minya.UUCP (John Chambers) writes:
> What I have is an application that starts
> as a daemon (started by init, mostly, but also from a user's command)
> that must grab a serial port, do some fiddling around with it, and
> then possibly start up a shell (sh, csh, whatevera) that talks to
> the port.  Sorta like telnetd, rshd, or the like, but on a real
> /dev/tty* port.  Does anyone know the magic incantations to do it
> right?

It sounds like you should be using pseudo-terminals. If you pick up my
pty program you can just do, e.g., pty -d /bin/csh (-d meaning it's
detached in the first place, as from a daemon). I'm sending a new 'n'
improved version of pty to comp.sources.unix soon.

---Dan