GNU bug report logs - #23451
25.0.93; Clarify the dependency on find/grep for platforms not having those tools

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From: npostavs <at> users.sourceforge.net
To: Dmitry Gutov <dgutov <at> yandex.ru>
Cc: 23451 <at> debbugs.gnu.org, Kaushal Modi <kaushal.modi <at> gmail.com>
Subject: bug#23451: 25.0.93; Clarify the dependency on find/grep for platforms not having those tools
Date: Mon, 29 May 2017 08:43:58 -0400

Dmitry Gutov <dgutov <at> yandex.ru> writes:

> On 5/29/17 5:58 AM, npostavs <at> users.sourceforge.net wrote:
>
>> So when <cmd> is grep, and the number of files is greater than the
>> command line length limit, the exit status is effectively random (it
>> depends on 'find' decides to group the batches of files it passes to
>> 'grep').
>
> Can we make Grep exit with 0 no matter if it matched something or not?
> So that non-zero means an actual problem.
>
> There is no suitable command-line option, it seems, but maybe there's
> a shell-based option? Like 'grep ... || exit 0', but I don't think we
> want to swallow exit statuses higher than 1.

This seems to work:

    find ... -exec sh -c 'grep -i -E -nH -e turn-on-eldoc-mode "$@" ; [ $? -le 1 ]' sh '{}' +

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