linux-kernel - Re: [PATCH] checkpatch: Fix check for embedded filename

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Date:   Sat, 05 Jun 2021 11:33:45 -0700
From:   Joe Perches <joe@...ches.com>
To:     Dwaipayan Ray <dwaipayanray1@...il.com>
Cc:     linux-kernel <linux-kernel@...r.kernel.org>,
        Lukas Bulwahn <lukas.bulwahn@...il.com>
Subject: Re: [PATCH] checkpatch: Fix check for embedded filename

On Sat, 2021-06-05 at 23:03 +0530, Dwaipayan Ray wrote:
> On Sat, Jun 5, 2021 at 10:51 PM Joe Perches <joe@...ches.com> wrote:
> > 
> > On Sat, 2021-06-05 at 21:42 +0530, Dwaipayan Ray wrote:
> > > When checkpatch is run on file contents piped through stdin,
> > > it may generate false EMBEDDED_FILENAME warnings if the
> > > --file flag is used.
> > 
> > I think this is a "don't do that" scenario and this change
> > is not necessary.
> > 
> 
> Okay then. I will drop this.
> Sorry for the noise.

I think you want something like this:
---
 scripts/checkpatch.pl | 1 +
 1 file changed, 1 insertion(+)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index dad87c3686326..582f8e07d32d5 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -331,6 +331,7 @@ help(0) if ($help);
 
 die "$P: --git cannot be used with --file or --fix\n" if ($git && ($file || $fix));
 die "$P: --verbose cannot be used with --terse\n" if ($verbose && $terse);
+die "$P: -f/--file requires at least one filename\n" if ($file && $#ARGV < 0);
 
 if ($color =~ /^[01]$/) {
 	$color = !$color;