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From: wescott@sauron.Columbia.NCR.COM (Mike Wescott)
Newsgroups: comp.unix.wizards
Subject: Is there a bug in SysV that permits a process to loose it's controlling tty
Message-ID: <817@sauron.Columbia.NCR.COM>
Date: Fri, 23-Jan-87 00:00:10 EST
Article-I.D.: sauron.817
Posted: Fri Jan 23 00:00:10 1987
Date-Received: Sat, 24-Jan-87 00:38:40 EST
Sender: news@sauron.Columbia.NCR.COM
Reply-To: wescott@sauron.UUCP (Mike Wescott)
Distribution: world
Organization: Advanced Systems Development, NCR Corp., Columbia, SC
Lines: 12

We have seen occasions where a getty gets spawned by init (this is System V, now)
and it opens up the line OK (a directly connected terminal) but getty, login, and
the resulting shell have lost their "controlling tty", i.e. the interrupt and quit
signals are ignored from the keyboard and "/dev/tty" cannot be opened.

/etc/crash shows that u.u_ttyp is null.

What sequence of events can result in this?  Any known bugs of this kind?

-- 
	-Mike Wescott
	 ncrcae!wescott