From owner-svn-doc-all@FreeBSD.ORG Mon Oct 7 10:10:19 2013 Return-Path: Delivered-To: svn-doc-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTP id EDC01B12; Mon, 7 Oct 2013 10:10:19 +0000 (UTC) (envelope-from pgj@FreeBSD.org) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:1900:2254:2068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id C091023F0; Mon, 7 Oct 2013 10:10:19 +0000 (UTC) Received: from svn.freebsd.org ([127.0.1.70]) by svn.freebsd.org (8.14.7/8.14.7) with ESMTP id r97AAJHO017092; Mon, 7 Oct 2013 10:10:19 GMT (envelope-from pgj@svn.freebsd.org) Received: (from pgj@localhost) by svn.freebsd.org (8.14.7/8.14.5/Submit) id r97AAJP1017091; Mon, 7 Oct 2013 10:10:19 GMT (envelope-from pgj@svn.freebsd.org) Message-Id: <201310071010.r97AAJP1017091@svn.freebsd.org> From: Gabor Pali Date: Mon, 7 Oct 2013 10:10:19 +0000 (UTC) To: doc-committers@freebsd.org, svn-doc-all@freebsd.org, svn-doc-head@freebsd.org Subject: svn commit: r42869 - head/en_US.ISO8859-1/htdocs/news/status X-SVN-Group: doc-head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-doc-all@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "SVN commit messages for the entire doc trees \(except for " user" , " projects" , and " translations" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 07 Oct 2013 10:10:20 -0000 Author: pgj Date: Mon Oct 7 10:10:19 2013 New Revision: 42869 URL: http://svnweb.freebsd.org/changeset/doc/42869 Log: - Add Q3 report on atomic close-on-exec Submitted by: jilles Modified: head/en_US.ISO8859-1/htdocs/news/status/report-2013-07-2013-09.xml Modified: head/en_US.ISO8859-1/htdocs/news/status/report-2013-07-2013-09.xml ============================================================================== --- head/en_US.ISO8859-1/htdocs/news/status/report-2013-07-2013-09.xml Sun Oct 6 22:40:10 2013 (r42868) +++ head/en_US.ISO8859-1/htdocs/news/status/report-2013-07-2013-09.xml Mon Oct 7 10:10:19 2013 (r42869) @@ -19,7 +19,7 @@

Thanks to all the reporters for the excellent work! This report - contains 17 entries and we hope you enjoy reading it.

+ contains 18 entries and we hope you enjoy reading it.

The deadline for submissions covering between October and @@ -897,4 +897,45 @@ SDIO-capable slot. + + + Atomic "close-on-exec" + + + + + Jilles + Tjoelker + + jilles@FreeBSD.org + + + + + + + + +

If threads or signal handlers call fork() and + exec(), file descriptors may be passed undesirably to + child processes, which may lead to hangs (if a pipe is not + closed), exceeding the file descriptor limit and security + problems (if the child process has lower privilege). One + solution is various new APIs that set the "close-on-exec" flag + atomically with allocating a file descriptor. Some existing + software will use the new features if present or will even + refuse to compile without them.

+ +

With mkostemp(), dup3(), and a change to + modes of fopen() and freopen(), everything + proposed in Austin Group issue #411 has now been implemented. + For all POSIX-specified functions that allocate file + descriptors, it is possible to request that the new descriptor + be set close-on-exec atomically.

+ +

Additionally, many file descriptors used internally by + libc and libutil now have the close-on-exec bit + set.

+ +