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Date:      Tue, 4 Jun 1996 06:16:33 +1000
From:      Bruce Evans <bde@zeta.org.au>
To:        bde@zeta.org.au, matt@lkg.dec.com
Cc:        hackers@FreeBSD.org
Subject:   Re: PR conf/1270
Message-ID:  <199606032016.GAA28036@godzilla.zeta.org.au>

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>> There is a problem with dangling pointers.  See kern_exit.c:
>> 
>> 			/*
>> 			 * s_ttyp is not zero'd; we use this to indicate

>Digital UNIX had the same misfeature.  Which is why it now uses 
>a vnode reference:

>        struct  vnode *s_ttyvp; /* vnode of controlling terminal */

>This also allows other things than classic ttys to be controlling 
>terminals (say streams devices or portals or ...).

FreeBSD already has s_ttyvp, but still needs s_ttyp.

Bruce



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