bug#23451: 25.0.93; Clarify the dependency on find/grep for platforms not having those tools

[Eli Zaretskii <eliz@gnu.org>]

On May 29, 2017 5:58:08 AM GMT+03:00, npostavs@users.sourceforge.net wrote:
>Dmitry Gutov <dgutov@yandex.ru> writes:
>
>> 4. See the user error about status 1, and the message containing four
>> grep hits. Doing this search with Ag confirms the same set of hits
>> (with normal exit status).
>>
>> Could someone please explain why find-grep exits with status 1 here?
>
>I see the same exit status when running find ... -exec grep ... + from
>the shell.  It seems that -exec <cmd> + will cause 'find' to exit with
>status 1 if the <cmd> exits with status 1:
>
>    ~$ find . -exec false '{}' + ; echo $?
>    1
>    ~$ find . -exec true '{}' + ; echo $?
>    0
>
>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').

Isn't this simply the consequence of grep returning non-zero status
for files that didn't match?