Date: Wed, 21 Jun 2006 13:41:45 GMT From: Christian Recktenwald <chris@lf.net> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/99251: can't create symlink named like an existing device on devfs Message-ID: <200606211341.k5LDfjkQ090612@www.freebsd.org> Resent-Message-ID: <200606211350.k5LDoG1O068389@freefall.freebsd.org>
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>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:
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