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 E2FB3C4167B for ; Mon, 7 Feb 2022 16:45:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1359519AbiBGQnk (ORCPT ); Mon, 7 Feb 2022 11:43:40 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40664 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1390502AbiBGQex (ORCPT ); Mon, 7 Feb 2022 11:34:53 -0500 Received: from 1wt.eu (wtarreau.pck.nerim.net [62.212.114.60]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id D2807C0401CE for ; Mon, 7 Feb 2022 08:34:50 -0800 (PST) Received: (from willy@localhost) by pcw.home.local (8.15.2/8.15.2/Submit) id 217GOdBd014406; Mon, 7 Feb 2022 17:24:39 +0100 From: Willy Tarreau To: "Paul E . McKenney" Cc: Mark Brown , linux-kernel@vger.kernel.org, Willy Tarreau Subject: [PATCH 23/42] tools/nolibc/stdio: add perror() to report the errno value Date: Mon, 7 Feb 2022 17:23:35 +0100 Message-Id: <20220207162354.14293-24-w@1wt.eu> X-Mailer: git-send-email 2.17.5 In-Reply-To: <20220207162354.14293-1-w@1wt.eu> References: <20220207162354.14293-1-w@1wt.eu> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org It doesn't contain the text for the error codes, but instead displays "errno=" followed by the errno value. Just like the regular errno, if a non-empty message is passed, it's placed followed with ": " on the output before the errno code. The message is emitted on stderr. Signed-off-by: Willy Tarreau --- tools/include/nolibc/stdio.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/tools/include/nolibc/stdio.h b/tools/include/nolibc/stdio.h index a73cf24cb68d..5f1cf32470d3 100644 --- a/tools/include/nolibc/stdio.h +++ b/tools/include/nolibc/stdio.h @@ -286,4 +286,10 @@ int printf(const char *fmt, ...) return ret; } +static __attribute__((unused)) +void perror(const char *msg) +{ + fprintf(stderr, "%s%serrno=%d\n", (msg && *msg) ? msg : "", (msg && *msg) ? ": " : "", errno); +} + #endif /* _NOLIBC_STDIO_H */ -- 2.35.1