From owner-freebsd-current  Tue May 28 21:18:33 2002
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Date: Wed, 29 May 2002 00:18:17 -0400
From: Alexander Kabaev <ak03@gte.com>
To: Dag-Erling Smorgrav <des@ofug.org>
Cc: Jos Backus <jos@catnook.com>, Bruce Evans <bde@zeta.org.au>,
	freebsd-current@FreeBSD.ORG
Subject: Re: zsh exits upon ^C after su'ing to root with zsh as its shell
Message-ID: <20020529041817.GA12755@kanpc.gte.com>
References: <20020528224503.GE11876@lizzy.catnook.com> <20020529105048.W23368-100000@gamplex.bde.org> <20020529030006.GB22504@lizzy.catnook.com> <20020529032604.GA12450@kanpc.gte.com> <xzpg00b6336.fsf@flood.ping.uio.no>
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> 
> Revision 1.51 of su.c fixes the bug.
> 
No it doesn't. This is an obvious step and of course I tried to do the
same first. This is what I was getting then and what I am getting now
with your patch applied (my comments are in angle brackets):

<Starting point: user is running zsh>
[user]% sudo -s
<root runs zsh>
[root]#
[root]#
[root]# su -
<root runs ksh93>
#
# <press ^D here, all seems to be OK, lets try again >
[root]# su -
# zsh: suspended (tty output)  su -
<this time shell gets immediately suspended for some reason>
[root]# fg
[1]  + continued  su -

#         
# 
# 
# 
# <press ^D>
[root]# 
[root]# ^D 
[user]% 

I was able to reproduce this behaviour only when sudo was used initially
to run user shell with root privileges. I've also seen similar weirdness
happen when screen is used too. This is why I had to disable signal
handling in su - somehow that does not conflict so much with other
programs.

-- 
Alexander Kabaev

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