[10083] in bugtraq
Re: tcpd remarks warning
daemon@ATHENA.MIT.EDU (Doug White)
Fri Apr 2 16:50:21 1999
Date: Fri, 2 Apr 1999 13:04:53 -0800
Reply-To: Doug White <dwhite@RESNET.UOREGON.EDU>
From: Doug White <dwhite@RESNET.UOREGON.EDU>
X-To: Stefano Torricella <thor@IRCITY.ORG>
To: BUGTRAQ@NETSPACE.ORG
In-Reply-To: <006101be7cdb$268b54a0$0100a8c0@thor.thornet.org>
On Fri, 2 Apr 1999, Stefano Torricella wrote:
> Some days ago i've had a problem with tcpd 1.10 - patchlevel 7.6. I
> suppose that the problem is in the parser routine but i haven't
> checked the source. I try to describe the bug :
>
> suppose you have an hosts.access or hosts.deny file like this
[...]
> # hosts.deny
> # some remarks
> #in.telnetd: 123.234.12.34, 98.76.54.32, \
> in.telnetd: 123.234.12.34, \
> 32.198.76.54
> ...
> well in this manner i've removed all the address !!! because the \ on the end of
> the remark line is treated how a continue of the normal line and in effect
> the comment continue for the next line and all the above line until the first line
> with the first char <> from space or tab !!
As a data point, Tcl handles this situation in the exact same way. Any
parser that parses and reassembles lines before interpreting them will
exhibit this behavior. I wouldn't call this a 'bug', more of a
'peculiarity.' :-) Such behavior does have its uses.
To avoid such situations, I don't use line-continuations in config files.
Doug White
Internet: dwhite@resnet.uoregon.edu | FreeBSD: The Power to Serve
http://gladstone.uoregon.edu/~dwhite | www.freebsd.org
