From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id ABA85C47080 for ; Tue, 25 Jan 2022 03:23:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1321929AbiAYDUM (ORCPT ); Mon, 24 Jan 2022 22:20:12 -0500 Received: from dfw.source.kernel.org ([139.178.84.217]:47272 "EHLO dfw.source.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1350390AbiAXTuX (ORCPT ); Mon, 24 Jan 2022 14:50:23 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 4E99560916; Mon, 24 Jan 2022 19:50:20 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 31978C340E5; Mon, 24 Jan 2022 19:50:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1643053819; bh=DIgOYh03wvGFM6IJ9KVgmDtuQm5cPvldYLsK2fYZFS0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UpB0S+hT+NxGW0jsNFzckQ8B/JMargJefU/i0rZT7YnG9000+p/l/ZHnCT2Pp0zDn OgyxdQeSVVtzABY4I+owx3lFRAzs0J4pSiGCZgSicMcjgwXBTeIqVD1iKXdizfz5E+ qLZrJZxwBY4raCuGiOEy9Q6gM4fT6SKg4dILWuAU= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Quentin Monnet , Paul Chaignon , Andrii Nakryiko , Yonghong Song , Sasha Levin Subject: [PATCH 5.10 188/563] bpftool: Enable line buffering for stdout Date: Mon, 24 Jan 2022 19:39:13 +0100 Message-Id: <20220124184030.919378117@linuxfoundation.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220124184024.407936072@linuxfoundation.org> References: <20220124184024.407936072@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Paul Chaignon [ Upstream commit 1a1a0b0364ad291bd8e509da104ac8b5b1afec5d ] The output of bpftool prog tracelog is currently buffered, which is inconvenient when piping the output into other commands. A simple tracelog | grep will typically not display anything. This patch fixes it by enabling line buffering on stdout for the whole bpftool binary. Fixes: 30da46b5dc3a ("tools: bpftool: add a command to dump the trace pipe") Signed-off-by: Quentin Monnet Signed-off-by: Paul Chaignon Signed-off-by: Andrii Nakryiko Acked-by: Yonghong Song Link: https://lore.kernel.org/bpf/20211220214528.GA11706@Mem Signed-off-by: Sasha Levin --- tools/bpf/bpftool/main.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/tools/bpf/bpftool/main.c b/tools/bpf/bpftool/main.c index c58a135dc355e..1854d6b978604 100644 --- a/tools/bpf/bpftool/main.c +++ b/tools/bpf/bpftool/main.c @@ -396,6 +396,8 @@ int main(int argc, char **argv) }; int opt, ret; + setlinebuf(stdout); + last_do_help = do_help; pretty_output = false; json_output = false; -- 2.34.1