Subject: Re: utmpx problem on NetBSD
To: Thomas Klausner <wiz@NetBSD.org>
From: Geoff Wing <email@example.com>
Date: 06/01/2005 17:37:46
On Tuesday 2005-05-31 01:18 +1000, Thomas Klausner output:
:I think I get the first error when I kill an xterm or rxvt
:with screen inside by exiting the window manager. I'm not
:quite sure when the second one happens; it might be interaction
:with screen too.
I'd say the problem is the interaction with screen. rxvt isn't waiting
for the child to exit completely before cleaning up so a race occurs.
I'd presume the sequence is:
1) screen has removed the original utmp entry while running
2) both rxvt and screen get a signal to exit
3) rxvt finishes first and tries to clean up the utmp entry which isn't
there because screen removed it, error spewed out from utmp_update(8)
4) screen finishes and maybe puts back the utmp entry it removed
I'll think about it and see if I can come up with a neater solution.