From owner-freebsd-questions@FreeBSD.ORG  Wed Jan  9 20:55:41 2013
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From: Lowell Gilbert <freebsd-questions-local@be-well.ilk.org>
To: Fbsd8 <fbsd8@a1poweruser.com>,  FreeBSD questions <questions@freebsd.org>
Subject: Re: sh script problem with capturing return code
References: <50EC9009.3030305@a1poweruser.com>
 <20130108224626.8c2d89cd.freebsd@edvax.de>
 <50EC99F2.3020404@a1poweruser.com> <44d2xevlhb.fsf@lowell-desk.lan>
 <50ED88CF.7060308@a1poweruser.com> <448v82unxb.fsf@lowell-desk.lan>
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Date: Wed, 09 Jan 2013 15:55:34 -0500
In-Reply-To: <444niqum7n.fsf@lowell-desk.lan> (Lowell Gilbert's message of
 "Wed, 09 Jan 2013 15:37:32 -0500")
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Lowell Gilbert <freebsd-questions-local@be-well.ilk.org> writes:

> It's not; ignore my example. The extra directory was under the ignored
> directory, so it's testing the right properties. I think if I create the
> new subdirectory under the other main directory, it would be right.

Confirmed. The test case now looks like this:
================================================================
mkdir etc home
mtree -c -d > ../out
mtree -d < ../out
echo $?
echo "That was the first: should be 0."
mkdir etc/temp
mtree -u -d < ../out
echo $?
echo "That was the second: should be 2."
sed -i ""  's/^\(home[ ]*\)\(.*\)$/\1ignore/' ../out
mtree -d < ../out
echo $?
echo "That was the third: should be 0."
================================================================

I think it's a real bug, and the test cases don't cover "extra" elements
at all. Now I just have to figure out the right fix.