From nobody Mon Apr 6 18:56:34 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 2E5923C3BEE; Wed, 18 Mar 2026 15:50:27 +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=1773849032; cv=none; b=qE+25+kCPzzYFvCfHA5p543I0pYE8B5LMyu9SjC035Mll9m73mkFEQrf0gdQrsreV/gJbxpq4hgC7IuBF+E8eGDxQk/DdOCKUN5RWpVDurhFBLwOPsTSoswPrJkrUP5DD5JYmHMEoHIpGIFYZw1HOIiKjqA+WPeJ24zyTjuh6AI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773849032; c=relaxed/simple; bh=ppeFS/esmOXFVznMHGq33Ol4W76goRqIc1twAuAacu4=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=jX3B5X1sTtdpBeSnfkq62z689kJtrSR2Esr72dfa0Lt1Pnk1cCWdPnN3ec288ZIfGcoABzYJC7FnBwzbgGL7HM5UneVde7IvwfpxcAW5M++O4K/0FxrH+SGI7wnYg9yus4rieBOoaFaNFoOk40Po4jnc9Xg5zW82FpEPKO6aU3M= 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=N1GbyH6f; 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="N1GbyH6f" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=weissschuh.net; s=mail; t=1773849020; bh=ppeFS/esmOXFVznMHGq33Ol4W76goRqIc1twAuAacu4=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=N1GbyH6fU2l3ExgyNVmsaawi4XH6Byr/2/As6z6P1npZ5a8al71UOrI3wFo/g97gO 64QHDz+6gM1OGQXin+0A2eSYy5voGoycIGbyFGlLuVjGCt/8Po8miQp0ysrgdjbo7r F7KTjnCtd2ey128HRa+85oMna4NhLrKvtRAT4XLw= From: =?utf-8?q?Thomas_Wei=C3=9Fschuh?= Date: Wed, 18 Mar 2026 16:50:17 +0100 Subject: [PATCH v4 2/2] 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: <20260318-nolibc-err-h-v4-2-08247a694bd9@weissschuh.net> References: <20260318-nolibc-err-h-v4-0-08247a694bd9@weissschuh.net> In-Reply-To: <20260318-nolibc-err-h-v4-0-08247a694bd9@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=1773849019; l=2997; i=linux@weissschuh.net; s=20221212; h=from:subject:message-id; bh=ppeFS/esmOXFVznMHGq33Ol4W76goRqIc1twAuAacu4=; b=ODSuRwrWWSg9WC0ZWpzkfmFKGrEPjnKCWj6qkEk4yc0mNiIlt0pv5u3pMYXScxI3ROYgvSFXU 2m5JiHuX4F0A3TaYt45X1irfLnvsPOdYa5K2VqNrnFItkGuJrYbVexU 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 | 87 +++++++++++++++++++++++++++++++++++++++= ++++ tools/include/nolibc/nolibc.h | 1 + 3 files changed, 89 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..e22ae87a7289 --- /dev/null +++ b/tools/include/nolibc/err.h @@ -0,0 +1,87 @@ +/* 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) +{ + fprintf(stderr, "%s: ", program_invocation_short_name); + vfprintf(stderr, fmt, args); + fprintf(stderr, ": %m\n"); +} + +static __attribute__((unused)) +void vwarnx(const char *fmt, va_list args) +{ + fprintf(stderr, "%s: ", program_invocation_short_name); + 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