GNU bug report logs - #30535
Output buffer overwritten when CR in file

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From: Wayne Gemmell <wayne <at> gemmell.co.za>
To: Paul Eggert <eggert <at> cs.ucla.edu>
Cc: 30535 <at> debbugs.gnu.org
Subject: bug#30535: Output buffer overwritten when CR in file
Date: Tue, 20 Feb 2018 07:34:07 +0000

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Hi Paul

That is exactly what I am getting. It is probably acting quite correctly,
the problem is that the shell executing those control characters is both
confusing and a possible security risk. I've tried this in ksh, dash, bash
and zsh and they all execute the control characters.

I think that they should be suppressed or escaped by default and a flag
should be provided to allow them to be passed out unescaped. Maybe this has
become a feature request...



On Mon, 19 Feb 2018 at 22:13 Paul Eggert <eggert <at> cs.ucla.edu> wrote:

> Wayne Gemmell wrote:
> > I would expect the CR to be output verbatim
>
> It is output verbatim, just as you expect. For example:
>
> $ printf 'messag1\rlogin\rmask' >test.log
> 503-day $ grep --color=never login test.log | od -c
> 0000000   m   e   s   s   a   g   1  \r   l   o   g   i   n  \r   m   a
> 0000020   s   k  \n
> 0000023
>
-- 
Regards
Wayne

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