From owner-cvs-src-old@FreeBSD.ORG Mon Jun 15 20:41:46 2009 Return-Path: Delivered-To: cvs-src-old@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id DFE83106566B for ; Mon, 15 Jun 2009 20:41:46 +0000 (UTC) (envelope-from jhb@FreeBSD.org) Received: from repoman.freebsd.org (repoman.freebsd.org [IPv6:2001:4f8:fff6::29]) by mx1.freebsd.org (Postfix) with ESMTP id AF86C8FC24 for ; Mon, 15 Jun 2009 20:41:46 +0000 (UTC) (envelope-from jhb@FreeBSD.org) Received: from repoman.freebsd.org (localhost [127.0.0.1]) by repoman.freebsd.org (8.14.3/8.14.3) with ESMTP id n5FKfiHj089784 for ; Mon, 15 Jun 2009 20:41:44 GMT (envelope-from jhb@repoman.freebsd.org) Received: (from svn2cvs@localhost) by repoman.freebsd.org (8.14.3/8.14.3/Submit) id n5FKfgws089782 for cvs-src-old@freebsd.org; Mon, 15 Jun 2009 20:41:42 GMT (envelope-from jhb@repoman.freebsd.org) Message-Id: <200906152041.n5FKfgws089782@repoman.freebsd.org> X-Authentication-Warning: repoman.freebsd.org: svn2cvs set sender to jhb@repoman.freebsd.org using -f From: John Baldwin Date: Mon, 15 Jun 2009 20:38:55 +0000 (UTC) To: cvs-src-old@freebsd.org X-FreeBSD-CVS-Branch: HEAD Subject: cvs commit: src/include unistd.h src/lib/libc/sys Makefile.inc Symbol.map close.2 closefrom.2 src/sys/compat/freebsd32 syscalls.master src/sys/kern kern_descrip.c syscalls.master src/tools/regression/file/closefrom Makefile closefrom.c ... X-BeenThere: cvs-src-old@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: **OBSOLETE** CVS commit messages for the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 15 Jun 2009 20:41:47 -0000 jhb 2009-06-15 20:38:55 UTC FreeBSD src repository Modified files: include unistd.h lib/libc/sys Makefile.inc Symbol.map close.2 sys/compat/freebsd32 syscalls.master sys/kern kern_descrip.c syscalls.master Added files: lib/libc/sys closefrom.2 tools/regression/file/closefrom Makefile closefrom.c closefrom.t Log: SVN rev 194262 on 2009-06-15 20:38:55Z by jhb Add a new 'void closefrom(int lowfd)' system call. When called, it closes any open file descriptors >= 'lowfd'. It is largely identical to the same function on other operating systems such as Solaris, DFly, NetBSD, and OpenBSD. One difference from other *BSD is that this closefrom() does not fail with any errors. In practice, while the manpages for NetBSD and OpenBSD claim that they return EINTR, they ignore internal errors from close() and never return EINTR. DFly does return EINTR, but for the common use case (closing fd's prior to execve()), the caller really wants all fd's closed and returning EINTR just forces callers to call closefrom() in a loop until it stops failing. Note that this implementation of closefrom(2) does not make any effort to resolve userland races with open(2) in other threads. As such, it is not multithread safe. Submitted by: rwatson (initial version) Reviewed by: rwatson MFC after: 2 weeks Revision Changes Path 1.94 +1 -0 src/include/unistd.h 1.139 +1 -1 src/lib/libc/sys/Makefile.inc 1.22 +3 -0 src/lib/libc/sys/Symbol.map 1.28 +1 -0 src/lib/libc/sys/close.2 1.1 +53 -0 src/lib/libc/sys/closefrom.2 (new) 1.117 +1 -0 src/sys/compat/freebsd32/syscalls.master 1.354 +36 -0 src/sys/kern/kern_descrip.c 1.251 +1 -0 src/sys/kern/syscalls.master 1.1 +9 -0 src/tools/regression/file/closefrom/Makefile (new) 1.1 +274 -0 src/tools/regression/file/closefrom/closefrom.c (new) 1.1 +10 -0 src/tools/regression/file/closefrom/closefrom.t (new)