From nobody Tue Jun 24 01:11:27 2025 X-Original-To: dev-commits-src-main@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4bR6NH6QhLz603NP; Tue, 24 Jun 2025 01:11:27 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R10" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4bR6NH28KKz3NPG; Tue, 24 Jun 2025 01:11:27 +0000 (UTC) (envelope-from git@FreeBSD.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1750727487; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=1NN6uz+Lgy1+Dp3d5s6VektdRyAhw70f2eUk3vzUPTs=; b=KpkgByD81gOgrBUJbSjQYUjcFFrxXuNAIcVjf3BqjGvjEOZ1g8j1p7EzlYQdw3NpSK351L TPxUz8v3NWBU1vbVY1TOlcGwROg+wWmkfVQNnhXDg6pc/wQvZjmxAV4dtIRh2tckNI3bJC vwZNUFzXPWXeAT18MOkV3LjV3lt/1LZUIu569G2uOzx+fioMDCBTHkFC4DClmRF0oLw6Ua n0Umu7AwQlrlftNO92JDuWWkOcBIPptVtt/M8kR3ZqZIB1Bx2zZbES7o59tQFOHG9v0uaZ qzWCLI0w+eygG+7kkFeK7+iE3Pb7XFkz1bpeRIwOpkeV9WPCQ2AX7T6muI/hag== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1750727487; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=1NN6uz+Lgy1+Dp3d5s6VektdRyAhw70f2eUk3vzUPTs=; b=IaooxTdBHhulV9z31tvLt4qRSGuxAB/foo3gsi3D8kVcMuhMW2skbE2Olh8/tzUL1kUQYS MQnHDO1q3y6mBtKt/cmW6QtbLyJsPIEhe3bqujvBaN1EHFaX4bj+tfyV2/PYqgwe1T1dBA zpdZ3GvttQ16sDFyb82mp+7GNfJHRo4u2gUzQ++nDkyFOZ47tARQF1S3wPd6L1evZeVGCH goJNCuuaiJzu4txUzbeFn7cO9CHMSkdVprdBfxTbEJvcnuqkPLC3nscyWtEAQmJ6gEOqq5 kWEc+03JeqMXtanPUPb7Th6qxCyTFjDdAu48zgs7pZ1oIASD/0clwWTp0x1UgQ== ARC-Authentication-Results: i=1; mx1.freebsd.org; none ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1750727487; a=rsa-sha256; cv=none; b=UPa9be5RjECL1n3J9qE3UlG9EdyEoaZTBl3pxdBf8ZPBwqmmharAyrK+IevcoNW3dnKOuY AXgvSs7F2TK2JMioPuO6O4dzQU5Bzni3D2/425hX9e4GD8GbGGjVLXFoFjBM6oESmclri6 F8YrS6AiJHbGI+bNOTU87mvQtSoFZz6hE3urLLgmCtA4ww7eVal/mA92A36SSXRIfuLjoe K/Xue1U0MfId7sFbNw1wRHfL/wALsnuO05lp0yysCOuxu/ofC85nuZ3MES3MV/CfJaMHnz 2W/uBxoS3gw7PrHAm9S7JZ70b69nFJj0hfqmkDsl7HBC6qbXQNVn2rwAm6Ys1w== Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 4bR6NH1Y1szB36; Tue, 24 Jun 2025 01:11:27 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org ([127.0.1.44]) by gitrepo.freebsd.org (8.18.1/8.18.1) with ESMTP id 55O1BRgh047002; Tue, 24 Jun 2025 01:11:27 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.18.1/8.18.1/Submit) id 55O1BRUN046999; Tue, 24 Jun 2025 01:11:27 GMT (envelope-from git) Date: Tue, 24 Jun 2025 01:11:27 GMT Message-Id: <202506240111.55O1BRUN046999@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org From: Konstantin Belousov Subject: git: 64584008139f - main - csu: C standard requires errno on main() entry List-Id: Commit messages for the main branch of the src repository List-Archive: https://lists.freebsd.org/archives/dev-commits-src-main List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: dev-commits-src-main@freebsd.org Sender: owner-dev-commits-src-main@FreeBSD.org MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: kib X-Git-Repository: src X-Git-Refname: refs/heads/main X-Git-Reftype: branch X-Git-Commit: 64584008139f73b07fa7c7979c41780be458b8cc Auto-Submitted: auto-generated The branch main has been updated by kib: URL: https://cgit.FreeBSD.org/src/commit/?id=64584008139f73b07fa7c7979c41780be458b8cc commit 64584008139f73b07fa7c7979c41780be458b8cc Author: Konstantin Belousov AuthorDate: 2025-06-23 23:46:43 +0000 Commit: Konstantin Belousov CommitDate: 2025-06-24 01:11:17 +0000 csu: C standard requires errno on main() entry Reported by: Greg Becker Reviewed by: emaste, kevans, markj Sponsored by: The FreeBSD Foundation MFC after: 1 week Also see: https://reviews.freebsd.org/D50998 Differential revision: https://reviews.freebsd.org/D50997 --- lib/libc/csu/libc_start1.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/lib/libc/csu/libc_start1.c b/lib/libc/csu/libc_start1.c index 045ea1e68141..5b08ba03ba8c 100644 --- a/lib/libc/csu/libc_start1.c +++ b/lib/libc/csu/libc_start1.c @@ -28,6 +28,7 @@ #include #include #include +#include #include #include "libc_private.h" @@ -169,6 +170,13 @@ __libc_start1(int argc, char *argv[], char *env[], void (*cleanup)(void), } handle_static_init(argc, argv, env); + + /* + * C17 4.3 paragraph 3: + * The value of errno in the initial thread is zero at program + * startup. + */ + errno = 0; exit(mainX(argc, argv, env)); } @@ -194,5 +202,6 @@ __libc_start1_gcrt(int argc, char *argv[], char *env[], monstartup(eprolp, etextp); handle_static_init(argc, argv, env); + errno = 0; exit(mainX(argc, argv, env)); }