GNU bug report logs - #41700
grep -v always exiting with 1 for empty file

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Andi Kleen <andi <at> firstfloor.org>
To: bug-grep <at> gnu.org
Subject: grep -v always exiting with 1 for empty file
Date: Wed, 3 Jun 2020 20:26:41 -0700

% grep --version
grep (GNU grep) 3.4
...
% echo -n > foo
% grep -v foo foo ; echo $?
1

Would expect it to exit with zero in this case, since foo is not in the
file.

When the file is one byte it works as expected:

% echo > foo
% grep -v foo foo ; echo $?

0
%

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