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bug#16586: bug#17245: GREP BUG: grep -P and binary files
From: |
Jim Meyering |
Subject: |
bug#16586: bug#17245: GREP BUG: grep -P and binary files |
Date: |
Wed, 23 Apr 2014 19:30:46 -0700 |
On Mon, Apr 21, 2014 at 11:03 AM, Paul Eggert <address@hidden> wrote:
> On 04/16/2014 05:13 AM, Norihiro Tanaka wrote:
>>
>> http://bugs.exim.org/show_bug.cgi?id=1468
>
>
> Thanks. The response there makes it clear that if grep passes arbitrary
> binary data to PCRE, and if grep uses PCRE_NO_UTF8_CHECK, undefined behavior
> will result (maybe infinite loop, core dump, etc.). We can't have undefined
> behavior in grep. A simple fix is to avoid using PCRE_NO_UTF8_CHECK so I
> installed the attached patch to do that. Perhaps we can think of a better
> way at some point. In the meantime I'm taking the liberty of closing
> Bug#17245 and Bug#16586.
Thanks for the patch, but I'm not sure I like the consequences:
that anyone using grep -P to search data that is even a tiny bit
inconsistent with their UTF-8 locale will now get an exit status of
2 rather than the matches they used to get. I would prefer to test for
working PCRE support and disable -P if it is deemed inadequate,
but that may have to wait for the release of a new version of
libpcre.
In any case, I found that this additional change is required,
at least on OS/X, to avoid a test failure:
k.txt
Description: Text document
- bug#17245: GREP BUG: grep -P and binary files, (continued)
- bug#17245: GREP BUG: grep -P and binary files, Norihiro Tanaka, 2014/04/12
- bug#17245: GREP BUG: grep -P and binary files, Jim Meyering, 2014/04/13
- bug#17245: GREP BUG: grep -P and binary files, Jim Meyering, 2014/04/13
- bug#17245: GREP BUG: grep -P and binary files, Norihiro Tanaka, 2014/04/15
- bug#17245: GREP BUG: grep -P and binary files, Paul Eggert, 2014/04/15
- bug#17245: GREP BUG: grep -P and binary files, Jim Meyering, 2014/04/15
- bug#17245: GREP BUG: grep -P and binary files, Norihiro Tanaka, 2014/04/16
- bug#16586: bug#17245: GREP BUG: grep -P and binary files, Paul Eggert, 2014/04/21
- bug#17245: GREP BUG: grep -P and binary files, Norihiro Tanaka, 2014/04/21
- bug#16586: bug#17245: GREP BUG: grep -P and binary files,
Jim Meyering <=
- bug#16586: bug#17245: GREP BUG: grep -P and binary files, Paul Eggert, 2014/04/24
- bug#16586: bug#17245: GREP BUG: grep -P and binary files, Jim Meyering, 2014/04/24