From owner-svn-src-all@freebsd.org Thu Jul 25 17:33:45 2019 Return-Path: Delivered-To: svn-src-all@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 9615AA9C5B; Thu, 25 Jul 2019 17:33:45 +0000 (UTC) (envelope-from brooks@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) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 7466D8CB4A; Thu, 25 Jul 2019 17:33:45 +0000 (UTC) (envelope-from brooks@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 4D1772295; Thu, 25 Jul 2019 17:33:45 +0000 (UTC) (envelope-from brooks@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id x6PHXj9F093046; Thu, 25 Jul 2019 17:33:45 GMT (envelope-from brooks@FreeBSD.org) Received: (from brooks@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x6PHXjr1093045; Thu, 25 Jul 2019 17:33:45 GMT (envelope-from brooks@FreeBSD.org) Message-Id: <201907251733.x6PHXjr1093045@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: brooks set sender to brooks@FreeBSD.org using -f From: Brooks Davis Date: Thu, 25 Jul 2019 17:33:45 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r350329 - stable/12/lib/libc/gen X-SVN-Group: stable-12 X-SVN-Commit-Author: brooks X-SVN-Commit-Paths: stable/12/lib/libc/gen X-SVN-Commit-Revision: 350329 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 7466D8CB4A X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-2.95 / 15.00]; local_wl_from(0.00)[FreeBSD.org]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; NEURAL_HAM_SHORT(-0.95)[-0.951,0]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; ASN(0.00)[asn:11403, ipnet:2610:1c1:1::/48, country:US] X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 25 Jul 2019 17:33:45 -0000 Author: brooks Date: Thu Jul 25 17:33:44 2019 New Revision: 350329 URL: https://svnweb.freebsd.org/changeset/base/350329 Log: MFC r350116: Document that setmode(3) is not thread safe. In some circumstances, setmode(3) may call umask(2) twice to retrieve the current mode and then restore it. Between calls, the process will have a umask of 0. Reviewed by: markj Sponsored by: DARPA, AFRL Differential Revision: https://reviews.freebsd.org/D20982 Modified: stable/12/lib/libc/gen/setmode.3 Directory Properties: stable/12/ (props changed) Modified: stable/12/lib/libc/gen/setmode.3 ============================================================================== --- stable/12/lib/libc/gen/setmode.3 Thu Jul 25 17:30:19 2019 (r350328) +++ stable/12/lib/libc/gen/setmode.3 Thu Jul 25 17:33:44 2019 (r350329) @@ -28,7 +28,7 @@ .\" @(#)setmode.3 8.2 (Berkeley) 4/28/95 .\" $FreeBSD$ .\" -.Dd February 22, 2015 +.Dd July 18, 2019 .Dt SETMODE 3 .Os .Sh NAME @@ -125,3 +125,10 @@ and .Fn setmode functions first appeared in .Bx 4.4 . +.Sh BUGS +The +.Fn setmode +function is not thread safe. +Files created in other threads while +.Fn setmode +is being called may be created with a umask of 0.