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[debbugs-tracker] bug#37716: closed (grep exit status with -L redirected


From: GNU bug Tracking System
Subject: [debbugs-tracker] bug#37716: closed (grep exit status with -L redirected to /dev/null)
Date: Sun, 13 Oct 2019 01:34:02 +0000

Your message dated Sat, 12 Oct 2019 18:33:23 -0700
with message-id <address@hidden>
and subject line Re: bug#37716: grep exit status with -L redirected to /dev/null
has caused the debbugs.gnu.org bug report #37716,
regarding grep exit status with -L redirected to /dev/null
to be marked as done.

(If you believe you have received this mail in error, please contact
address@hidden.)


-- 
37716: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=37716
GNU Bug Tracking System
Contact address@hidden with problems
--- Begin Message --- Subject: grep exit status with -L redirected to /dev/null Date: Sat, 12 Oct 2019 15:22:05 +0100 User-agent: Mutt/1.12.2 (2019-09-21)
Hi grep maintainers,

This behaviour, with grep 3.3 built from source, is a bit surprising:

$ echo hello >thing
$ grep -L goodbye thing && echo OK
thing
OK
$ grep -L goodbye thing >/dev/null && echo OK
$

That is, when using -L, redirecting stdout to /dev/null has the same
effect on the exit code as specifying -q (the behaviour with -q is
described in the "Exit Status" section of the manual). This is a bit
awkward if you're using grep in a script, because you don't necessarily
have any control over whether stdout is /dev/null or not.

Cheers,

-- 
Adam Sampson <address@hidden>                         <http://offog.org/>



--- End Message ---
--- Begin Message --- Subject: Re: bug#37716: grep exit status with -L redirected to /dev/null Date: Sat, 12 Oct 2019 18:33:23 -0700 User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.9.0 Thanks for reporting that bug. To fix it, I installed the attached patch into grep master on Savannah.

Attachment: 0001-grep-fix-grep-L-.-dev-null-bug.patch
Description: Text Data


--- End Message ---

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