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Re: kern/46522

The following reply was made to PR kern/46522; it has been noted by GNATS.

From: (John Nemeth)
Subject: Re: kern/46522
Date: Sun, 3 Jun 2012 11:33:58 -0700

 On Sep 19,  3:32am, Nat Sloss wrote:
 } From: Nat Sloss <>
 } To:
 } Subject: Re: kern/46522
 } Date: Mon, 4 Jun 2012 01:18:13 +1000
 }  Hi.
 }  I've found that it only crashes when deleting a screen that has a getty 
 }  running on it.  Deleting a screen that has no running programmes works.
 }  What is causing the problem is cv_destroy(&tp->t_rawcv) I believe that  
 }  is waiting on that conditional variable as the crash says that the cv is in 
 }  use.
 }  Destroying the other cvs' as found in tty_free works.
 }  I would like to kill the getty before destroying the cvs' but I have no 
 }  how I've tried sending signals with no success, and I have no idea as to 
 }  to make it wait until the process is killed, but I think this is the source 
 }  of the problem.
      You need to edit /etc/ttys and change status to "off" for the
 appropriate tty, then "kill -1 1" to tell init to reread /etc/ttys.  If
 you just kill the getty init will restart it.
      However, there is still a bug.  The system shouldn't crash.  It
 should either error out when the tty is in use, or forcibly detach all
 processes from the tty.
 }-- End of excerpt from Nat Sloss

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