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From: pdb@sei.cmu.edu (Patrick Barron)
Newsgroups: news.groups,news.sysadmin
Subject: Re: who, me?
Keywords: security, virus, summer job
Message-ID: <2975@ci.sei.cmu.edu>
Date: 15 Nov 88 22:21:45 GMT
References: <247@aplcen.apl.jhu.edu>
Reply-To: pdb@sei.cmu.edu (Patrick Barron)
Organization: Software Engineering Institute, Pittsburgh, PA
Lines: 12

In article <247@aplcen.apl.jhu.edu> bright@aplcen.UUCP (Jonathan Bright) writes:
>4) On berkeley unix, because of the ioctl(fd,TIOCSTI) having terminals
>writable is a big bug (see man 4 tty for details).  Mesg should
>set world execute bit instead of world write bit to signal that the
>person wants to receive messages, and then run as suid root (or some
>variation of this).  (God, posting this just killed me...)

You can't necessarily TIOCSTI a terminal if you can write to it.  TIOCSTI
only works if 1) the terminal in question is your process's control terminal,
or 2) you're root.

--Pat.