Path: utzoo!utgpu!watserv1!watmath!att!tut.cis.ohio-state.edu!snorkelwacker!usc!samsung!uakari.primate.wisc.edu!uflorida!mephisto!mcnc!unccvax!cs00chs
From: cs00chs@unccvax.uncc.edu (charles spell)
Newsgroups: comp.unix.questions
Subject: How to make a tty un'open(2)'able after another process opens it
Keywords: open(2), ioctl(2)
Message-ID: <2699@unccvax.uncc.edu>
Date: 10 Sep 90 15:40:58 GMT
Organization: University of NC at Charlotte
Lines: 13


Is there a way (besides lock files) that I can set a /dev/tty* to be
unopenable by other processes once it is opened by a process? The optimal
way would be for open() to return -1 if the tty is already being used.


It seems like there would be an easy way via ioctl(). I would like to
know how to do this on a pyramid 9815 even if it is not portable.
-- 
.--------------------------.  ...  |On the border of your mind lies a place
|uunet!mcnc!unccvax!cs00chs|  (")  |where dreams and reality are one...I will 
`--------------------------'-w-U-w-|take you there, for I am the subject...
\%\%\%\%\%\%\%\%\%\%\%\%\%\%\%\%\%\|the subject of your imagination. -Aldo Nova