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Date: Sun, 6 Dec 2009 11:39:03 +1100
From: andrew clarke <mail@ozzmosis.com>
To: freebsd-questions@freebsd.org
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Subject: tcsh backtick/quote bug on FreeBSD 7.2
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Hi,

I just stumbled across a bug in the version of tcsh supplied with
FreeBSD 7.2.

$ uname -a
FreeBSD blizzard.phoenix 7.2-RELEASE-p4 FreeBSD 7.2-RELEASE-p4 #0: Fri Oct  2 12:21:39 UTC 2009     root@i386-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC  i386
$ which tcsh
/bin/tcsh
$ tcsh --version
tcsh 6.15.00 (Astron) 2007-03-03 (i386-intel-FreeBSD) options wide,nls,dl,al,kan,sm,rh,color,filec
$ tcsh -f
> "`"
Unmatched `.
Segmentation fault (core dumped)
$

Regular tcsh isn't in the ports tree, although there is a modified
version called tcsh-bofh.  It's apparently based on an older version
of tcsh and is not vulnerable.

$ /usr/local/bin/tcsh --version
tcsh 6.12.00 (Astron) 2002-07-23 (i386-intel-FreeBSD) options
8b,nls,dl,al,rh,color,filec
$ /usr/local/bin/tcsh -f
> "`"
Unmatched `.
>

Regards
Andrew