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From: guy@sun.uucp (Guy Harris)
Newsgroups: net.unix-wizards
Subject: Re: reassigning a control terminal
Message-ID: <2889@sun.uucp>
Date: Sat, 12-Oct-85 20:05:14 EDT
Article-I.D.: sun.2889
Posted: Sat Oct 12 20:05:14 1985
Date-Received: Tue, 15-Oct-85 07:19:05 EDT
References: <385@bocklin.UUCP>
Distribution: net
Organization: Sun Microsystems, Inc.
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> Is there any way to reassign the control terminal associated with a
> process that has been forked from a process to which a control ter-
> minal is associated?  That is, can I get a forked process to change
> the device associated with /dev/tty?  We are running 4.2bsd.

There is an (undocumented, mumble bitch grumble) "ioctl" call that permits a
process which has a control terminal to detach itself from that control
terminal.  You open "/dev/tty" (if it fails, there's no control terminal to
detach yourself from) and do a TIOCNOTTY "ioctl" call (it takes no
parameters).  The next terminal that process opens will become its control
terminal.

	Guy Harris