From owner-freebsd-bugs@FreeBSD.ORG Wed Jun 21 13:50:18 2006 Return-Path: X-Original-To: freebsd-bugs@hub.freebsd.org Delivered-To: freebsd-bugs@hub.freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 9986216A47D for ; Wed, 21 Jun 2006 13:50:18 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [216.136.204.21]) by mx1.FreeBSD.org (Postfix) with ESMTP id 4F20C43D49 for ; Wed, 21 Jun 2006 13:50:17 +0000 (GMT) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (gnats@localhost [127.0.0.1]) by freefall.freebsd.org (8.13.4/8.13.4) with ESMTP id k5LDoHQV068393 for ; Wed, 21 Jun 2006 13:50:17 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.13.4/8.13.4/Submit) id k5LDoG1O068389; Wed, 21 Jun 2006 13:50:17 GMT (envelope-from gnats) Resent-Date: Wed, 21 Jun 2006 13:50:17 GMT Resent-Message-Id: <200606211350.k5LDoG1O068389@freefall.freebsd.org> Resent-From: FreeBSD-gnats-submit@FreeBSD.org (GNATS Filer) Resent-To: freebsd-bugs@FreeBSD.org Resent-Reply-To: FreeBSD-gnats-submit@FreeBSD.org, Christian Recktenwald Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 6D01216A47D for ; Wed, 21 Jun 2006 13:41:46 +0000 (UTC) (envelope-from nobody@FreeBSD.org) Received: from www.freebsd.org (www.freebsd.org [216.136.204.117]) by mx1.FreeBSD.org (Postfix) with ESMTP id 39E0D43D46 for ; Wed, 21 Jun 2006 13:41:46 +0000 (GMT) (envelope-from nobody@FreeBSD.org) Received: from www.freebsd.org (localhost [127.0.0.1]) by www.freebsd.org (8.13.1/8.13.1) with ESMTP id k5LDfj4q090618 for ; Wed, 21 Jun 2006 13:41:45 GMT (envelope-from nobody@www.freebsd.org) Received: (from nobody@localhost) by www.freebsd.org (8.13.1/8.13.1/Submit) id k5LDfjkQ090612; Wed, 21 Jun 2006 13:41:45 GMT (envelope-from nobody) Message-Id: <200606211341.k5LDfjkQ090612@www.freebsd.org> Date: Wed, 21 Jun 2006 13:41:45 GMT From: Christian Recktenwald To: freebsd-gnats-submit@FreeBSD.org X-Send-Pr-Version: www-2.3 Cc: Subject: kern/99251: can't create symlink named like an existing device on devfs X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 21 Jun 2006 13:50:18 -0000 >Number: 99251 >Category: kern >Synopsis: can't create symlink named like an existing device on devfs >Confidential: no >Severity: non-critical >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Wed Jun 21 13:50:16 GMT 2006 >Closed-Date: >Last-Modified: >Originator: Christian Recktenwald >Release: 5.5p2 >Organization: >Environment: FreeBSD my.host 5.5-RELEASE-p2 FreeBSD 5.5-RELEASE-p2 #0: Mon i386 i386 Pentium III/Pentium III Xeon/Celeron FreeBSD >Description: Task: set symlink /dev/mem -> /dev/null Action: cd /dev ln -sf null mem Test: ls -l *mem Result: ls: mem: No such file or directory crw-r----- 1 root kmem 244, 1 Jun 20 19:35 kmem Debugging (after reboot): cd /dev ls -l *mem crw-r----- 1 root kmem 244, 1 Jun 20 19:35 kmem crw-r----- 1 root kmem 244, 0 Jun 20 19:35 mem rm mem ls -l *mem crw-r----- 1 root kmem 244, 1 Jun 20 19:35 kmem ln -s null mem or perl -e 'symlink "null","mem" or die "$!"' ls -l *mem ls: mem: No such file or directory crw-r----- 1 root kmem 244, 1 Jun 20 19:35 kmem echo *mem kmem mem so: sh's globbing finds a directory entry "mem", but there is no stat(2)-able inode also interesting: each time I try ln -s null mem there is one more "mem"-entry echo *mem kmem mem mem ln -s null mem echo *mem kmem mem mem mem sometime like ln -s a b works as experted >How-To-Repeat: mkdir /tmp/x mount -t devfs devfs /tmp/x cd /tmp/x ls -l *mem rm mem ls -l *mem ln -s null mem ls -l *mem echo *mem >Fix: >Release-Note: >Audit-Trail: >Unformatted: