From nobody Tue Apr 7 21:27:05 2026 Received: from todd.t-8ch.de (todd.t-8ch.de [159.69.126.157]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6D95835A387; Wed, 11 Mar 2026 22:01:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.69.126.157 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773266492; cv=none; b=H5GVXKDYw5WlJ2KW6py71e7X/H8ZBV57CnJRX3tFvu89VSTI7m7M6jL2Q1QnspvF7R0Z5PMPyLuJSQB08acmVpad23HOatLwbr90SYmgMs7/MbMI9lky/iHuVBfn8IpCUTi6y4Jom9KOC8Uda5va+Z5PrI9kJYmwobMQiViqWdc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773266492; c=relaxed/simple; bh=DQ9Zc0Q7xc6dZOq15nfDtuT6wEnkMqTtKK6Bhc6CYPI=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=RzUAQqYt0feDkv2DKg3h8xt8lStoWjvTEZJclQISciSe1kIUC9uHJE4gf2dawS0BVZTwhlbpEoEWyXdH02CbTUFe6eP6xUou6W34jjS/7VZjy69I/1GFb06QwJDrkQZeDZDEEQzQrkfFZqX1jlCA8OxSK0kaLg6mouA4g0/xENc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=weissschuh.net; spf=pass smtp.mailfrom=weissschuh.net; dkim=pass (1024-bit key) header.d=weissschuh.net header.i=@weissschuh.net header.b=Z1QaMm+U; arc=none smtp.client-ip=159.69.126.157 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=weissschuh.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=weissschuh.net Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=weissschuh.net header.i=@weissschuh.net header.b="Z1QaMm+U" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=weissschuh.net; s=mail; t=1773266488; bh=DQ9Zc0Q7xc6dZOq15nfDtuT6wEnkMqTtKK6Bhc6CYPI=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=Z1QaMm+ULA5QJ+M8hUnN1h45YC142/a9fJMeBY/w66uB91mKSG3oPPF06la2fpDWz /7oK8QrPrO1UiVyNzf8/TcbRKrX/Df6CA+WCwHGQkhR6cFIv/zrxeLtBpkKPzHrQ94 0zjwMTSigBflEWaqaR6zRDvScrPGRGQHvYd4/O8g= From: =?utf-8?q?Thomas_Wei=C3=9Fschuh?= Date: Wed, 11 Mar 2026 23:00:52 +0100 Subject: [PATCH 4/4] tools/nolibc: add err.h Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260311-nolibc-err-h-v1-4-735a9de7f15d@weissschuh.net> References: <20260311-nolibc-err-h-v1-0-735a9de7f15d@weissschuh.net> In-Reply-To: <20260311-nolibc-err-h-v1-0-735a9de7f15d@weissschuh.net> To: Willy Tarreau , Shuah Khan Cc: linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, =?utf-8?q?Thomas_Wei=C3=9Fschuh?= X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1773266488; l=3075; i=linux@weissschuh.net; s=20221212; h=from:subject:message-id; bh=DQ9Zc0Q7xc6dZOq15nfDtuT6wEnkMqTtKK6Bhc6CYPI=; b=Ns1nx88qAYwjYB7FtBsijU3e5BA1Kgpt9MbVs6r0CCOKTnwwXVE3bstzF0UCqIb7hf0I8YgAg EMC8+Q5wZ8BDRN3Q0pCLQMAjJyrUqr7KnhdEh5Jm/mGILfjXN+0w03L X-Developer-Key: i=linux@weissschuh.net; a=ed25519; pk=KcycQgFPX2wGR5azS7RhpBqedglOZVgRPfdFSPB1LNw= Add a few convenient helpers to print error and warning messages. Signed-off-by: Thomas Wei=C3=9Fschuh --- tools/include/nolibc/Makefile | 1 + tools/include/nolibc/err.h | 91 +++++++++++++++++++++++++++++++++++++++= ++++ tools/include/nolibc/nolibc.h | 1 + 3 files changed, 93 insertions(+) diff --git a/tools/include/nolibc/Makefile b/tools/include/nolibc/Makefile index 1958dda98895..5d242312943f 100644 --- a/tools/include/nolibc/Makefile +++ b/tools/include/nolibc/Makefile @@ -30,6 +30,7 @@ all_files :=3D \ ctype.h \ dirent.h \ elf.h \ + err.h \ errno.h \ fcntl.h \ getopt.h \ diff --git a/tools/include/nolibc/err.h b/tools/include/nolibc/err.h new file mode 100644 index 000000000000..2373c4999b71 --- /dev/null +++ b/tools/include/nolibc/err.h @@ -0,0 +1,91 @@ +/* SPDX-License-Identifier: LGPL-2.1 OR MIT */ +/* + * formatted error message for NOLIBC + * Copyright (C) 2026 Thomas Wei=C3=9Fschuh + */ + +/* make sure to include all global symbols */ +#include "nolibc.h" + +#ifndef _NOLIBC_ERR_H +#define _NOLIBC_ERR_H + +#include "errno.h" +#include "stdarg.h" +#include "sys.h" + +static __attribute__((unused)) +void vwarn(const char *fmt, va_list args) +{ +#ifndef NOLIBC_IGNORE_ERRNO + fprintf(stderr, "%s: ", program_invocation_short_name); +#endif + vfprintf(stderr, fmt, args); + fprintf(stderr, ": %m\n"); +} + +static __attribute__((unused)) +void vwarnx(const char *fmt, va_list args) +{ +#ifndef NOLIBC_IGNORE_ERRNO + fprintf(stderr, "%s: ", program_invocation_short_name); +#endif + vfprintf(stderr, fmt, args); + fprintf(stderr, "\n"); +} + +static __attribute__((unused)) +void warn(const char *fmt, ...) +{ + va_list args; + + va_start(args, fmt); + vwarn(fmt, args); + va_end(args); +} + +static __attribute__((unused)) +void warnx(const char *fmt, ...) +{ + va_list args; + + va_start(args, fmt); + vwarnx(fmt, args); + va_end(args); +} + +static __attribute__((noreturn, unused)) +void verr(int eval, const char *fmt, va_list args) +{ + vwarn(fmt, args); + exit(eval); +} + +static __attribute__((noreturn, unused)) +void verrx(int eval, const char *fmt, va_list args) +{ + warnx(fmt, args); + exit(eval); +} + +static __attribute__((noreturn, unused)) +void err(int eval, const char *fmt, ...) +{ + va_list args; + + va_start(args, fmt); + verr(eval, fmt, args); + va_end(args); +} + +static __attribute__((noreturn, unused)) +void errx(int eval, const char *fmt, ...) +{ + va_list args; + + va_start(args, fmt); + verrx(eval, fmt, args); + va_end(args); +} + +#endif /* _NOLIBC_ERR_H */ diff --git a/tools/include/nolibc/nolibc.h b/tools/include/nolibc/nolibc.h index d1d08b7f8599..fe8195483b6d 100644 --- a/tools/include/nolibc/nolibc.h +++ b/tools/include/nolibc/nolibc.h @@ -130,6 +130,7 @@ #include "getopt.h" #include "poll.h" #include "math.h" +#include "err.h" =20 /* Used by programs to avoid std includes */ #define NOLIBC --=20 2.53.0